MediaTomb is an open source UPnP MediaServer.Its comes with very beautiful web user interface and released under the GNU General Public License (GPL).It supported multiple operating system like x86, Alpha, ARM, MIPS, Sparc, and Power PC with support for Linux, FreeBSD, NetBSD, and Mac OS X. By using MediaTomb you can stream your digital media through your home network and watch/listen it different type of UPnP compatible devices.

Ansible is a free configuration management tool. It is a simple automation system for managing and configuring computers. It is created by Michael DeHaan author of the provisioning server application Cobbler. Ansible is used for different configuration applications like cloud provisioning,configuration-management,ad-hoc task-execution. It also used for managing nodes over power shell and multi node deployment.

darktablev is an open source image editor photography tool. It is a work flow application and raw developers which consist of virtual lightable darkroom for photographers. It is written in C language and supported major Linux distribution. It has a ability to handle the large number of images very easily. darktable provide the zoom able user interface and has zero latency full screen. The basic image operation

inFlow is a free inventory management software solution. It is very useful inventory management software for small and medium size business with 10 or less employees in wholesale, retail or manufacturing. With inFlow free version you can manage 100 products and customer and generate dozen reports but you cannot access some extra advanced features in free version. However free version has no expiration date you can use it unlimited time period. InFlow also provide the integration facility you can integrate it with QuickBooks

OpenShot is a free and open source video editor software tool for beginning videographer.It just supported Linux operating system and built with Python, GTK, and the MLT Framework.A layman can easily learn this application,its comes with very good documented helping material.OpenShot is a very feature rich product.List of features presented by OpenShot are it supported different format of video,audio and images,

Moodle is an open source online e learning management system written in PHP and distributed under the GNU General Public License. Most of the education institute like universities, workplaces and other sectors used this open source SaaS suites. Moodle is very comprehensive education framework mostly used for distance learning, blended learning,flipped classroom. Moodle comes with customization plugin features.

Bro is an open source network security monitor platform. It provide the stability and flexibility at large scale and illuminate network activity in detail. Bro can also be used for different purposes like used it for forensic investigation, network measurements, trafic base line and build Network intrusion detection systems (NIDS) etc. Bro is written in C++ and used in different operating systems like Linux, FreeBSD, Mac OS X.

Chromium is an open source web browser project and the core of Google's Chrome. It was initially released on 2008 and mainly written in C++ language. Chromium provide the source code after downloading,through source code you can customize it according to your need and run on different platform. It is very excellent web browser project provide the feature of fast lightweight browsing and provide the full development tools to developers,

Nginx is a free and open source web server. It is very fast web server written by Igor Sysoev a Russian software engineer. The main focus of this web serve is to provide high concurrency, performance and low memory usage. Nigix can be work as application accelerator,media delivery system and reverse proxy server for HTTP, HTTPS, SMTP, POP3. Nginx provide the features of load balancing, HTTP cache,streaming media services,offload concurrency,static content, latency processing,

D3 (Data-Driven Documents) is an open source tool for data visualization in Web documents. By using D3 you can manage the scatter or arbitrary data to document object model. And by using D3 you can apply data-driven transformations to the document. By using D3 you can generate HTML table for different array of numbers. It enhance the life of data by using HTML,CSS and SVG. It provide the powerful visualization components and provide the capability

ERPNext is a well known open source integrated Enterprise Resource Planning (ERP) software solution. It is developed by Web Notes Technologies Pvt Ltd. This open source software written in Python language and used MySQL database for data storage. ERPNext has changed the framework and move to new web framework Fappe. This new framework provide the support of plug-ins and extensions. This software available Software as a Services (SaaS) and in house hosting.

Document Management System (DMS) is a system which is used for track manage and store of electronic documents and electronic images. DMS is a complete cycle process which consist of Creation, Location, Authentication, Workflow, Filing, Distribution, Retrieval, Security, Retention and Archiving. OpenKM is an open source web based document management system. It is a comprehensive full document management application provide the function of metadata, workflow, file history and version control,scanning etc.

Chrome is a free and open source web browser. It is developed by Google and stable public released on December 11, 2008.It support number of operating stems like Linux, Mac, and Windows and also supported mobile devices like iOS and Android. Google used the WebKit layout engine and in 28 version Chrome has used WebKit fork Blink. According to StatCounter Google Chrome has approximately 51% worldwide usage market share. Google Chrome browser maximum source code is open source means every one has a freedom to customize this browser.

AdBlock is an open source content filtering ad blocking extension for browsers. Number of browser are supported this extension like Google Chrome, Apple Safari, Mozilla Firefox, and Opera web browsers. It is not just a ad block extension,it can also used for blocking web tracking bugs and malicious domains. It is very comprehensive app for blocking domains which are host malware and spy ware. It is a free application you can download it

GnuCash is a free and open source account management software tools. This accounting software are used for maintain the record and book-keeping for individual and business. GnuCash is a flexible accounting application you can customize it according to your specific need. GunCash supported multiple languages and also designed for cross platform. You can use this software on number of operating system like Linux, BSD, Solaris, Mac OS X and Microsoft Windows.

Tarantula is a free and open source test management tool. It is a advance testing tool which do software testing in a agile software projects. The basic goal of this software is to become the best open source test management tool in various filed like Testing,Agile testing,Usability and Reproting. It is a Java Web Cralwer software tool. It provide the multiple features to their user such like it provide scalability.

Bugzilla is an open source bug tracking tool. It is a web based testing tool developed by Mozil project. It also come with under Mozila Public License. Some of well known open source projects are using this tool. Some of these are Apache developer,Linux Kernel developer,GNOME developer,Red Hat Distribution etc. This software application is written in Perl language and used Mysql and Oracle database for storage.

JMeter is an open source pure Java based application used to test and measure the performance and load. It comes with beautiful user friendly Graphical User Interface (GUI) . Through GUI you can test and debugging quickly. By using this tool testing can be done on static and dynamic resources such like perl Scripts,Java Objects,files,Database,Queries,Servlets,FTP server etc. Statistics of sever load can be select through plugable timer.

Iptables is an open source firewall utility for Linux based operating system. Iptables is very flexible tool which based on command line. It is used for maintain,set up and inspect the table of IP packet and filer rules. These tables consist of many user defined chain. Most of the Linux administrator are use it for tuning of their server. Iptables use three different type of chain. These chains are input,forward and output chain.

Cacti is an open source web based monitoring and tracking tool. It is very high performance graphical tool for networking monitoring. This application run on Apache and supported PHP and Mysql database. It facilitate their user by providing customize able front end Graphical User Interface to the PRDTool, it control temperatures, bandwidth and CPU load. Cacti allow their user to determine the data in a specific time periods by scheduling. This software has a ability to track fan speeds,power supply and disk utilization. It provide data collection script to their user and can also collect data through SNMP.

MySQL is a very powerful open source database.Its provide cost effective database storage solution to its user.MySQL is highly reliable and saclable web based database embedded application. It provide very high quality of performance.MySQL source code is publicly open every one access its source code and customize it according to their needs. Mysql is a main part of LAMP open source web application stack.Most of the open source project whose needed multiple features database often used MySQL database system. Mysql is also available for proprietary use.Different paid edition are available which consist of additional functions.

Electronic-Commerce we usually known as e-commerce is a platform which provide services and product deploying by internet computer networking.We can also say that e-commerce is a virtual online store where customer comes on specif online e-commerce website and buy services and products which they needed.Use of online e-commerce increasing day by day.Those days are not so far when online e-commerce market is the no.1 choice of merchant and customer. Technology has also positively effect on e-commerce and modernized it with the passage of time.

Open source software is a computer software/program whose source code is publicly available with a license.In which copyright holder provide the rights to user to change,study and distribute the software further to anyone and for any purpose.Open source is the most visible example of open source development programme which is compare to open content movement.Open source model is provide the very comprehensive design of software.Because this design was made with effort of different volunteer developer.This design and architecture made very fastly as compare to if company develop alone.

Linux is an open source operating system.Linus Torvald is the founder of this Operating system.system. Liunx was developed in 1991 by Linus Torvalds.But it is not a complete operating system.It is an open source kernel. Different Linux distribution are made by using this kernel. Different Linux distribution combine Linux kernel with other open source
software and make a full operating systems.

GNU General Public License is a free software licence.This is the most widely used licence throught the world.Percentage of using this licence is 25% which is greater than any other open source licence.This licence provide their user freedom to use,share and modify the software.The software which provides these types of freedom is called free software.The user of this licence are individual organizations and companies all over the world.Very important aspect of this software licence is that it provide freedom to their user to cooperate.It allow the user to share their thoughts for fixing bugs and increase the functionality of software.

The Session Initiation Protocol (SIP) is a communications protocol for signaling and controlling multimedia communication sessions in applications of Internet telephony for voice and video calls, in private IP telephone systems, as well as in instant messaging over Internet Protocol (IP) networks.

The protocol defines the methodology of SIP communications and the specific format of messages exchanged for cooperation of the participants in multimedia sessions. SIP is designed to be independent of the underlying transport layer protocol, and can be used with the User Datagram Protocol (UDP), the Transmission Control Protocol (TCP), and the Stream Control Transmission Protocol (SCTP). It is a text-based protocol, incorporating many elements of the Hypertext Transfer Protocol (HTTP) and the Simple Mail Transfer Protocol (SMTP).
In this article we discussed top five open source sip libraries that developers / programmers can use to develop sip based applications .

Ubuntu is a free and open source Operating System platform based on Linux Kernel. This Operating System is very easy to use and understand.Ubuntu provide free security updates. By default Ubuntu Operating System included many software like Firefox, Games, LibreOffice, Transmission and Thunderbird. It is develop on Debian's architecture and is available for different platform like Desktop, tablet, phone.

ERP(Enterprise Resource Planning) is a management software system for business. This software allow their user to automate and integrate their business application. Through ERP organizations manage easily different functions which belong to services,human resource, technology etc. ERP allow you to integrate Multiple operations of business which perform different departments like development,planning,manufacturing,marketing,sales,Shipping and payment etc.

Call center center software is used to deliver and receive large number of telephone calls by agent.The work of agent is to guide the customer about specific product or services.Call center software mostly support inbound and outbound campaign.Large number of Open Source Call Center software are developed by Open Source Community.Lets we see some of the top two Open Source Call Center Software.

PBX(Private Branch Exchange) is a small telephony system. PBX provides ease for enterprises to build an internal telephone connection for the enterprise users. It also allows the user to share a specific number for external phone lines. The basic purpose of PBX is to save the communication cost in the enterprise. Instead of using separate telephone lines for each employee by using you can share one line with a number of employees.