Zimbra Collaboration Server

Zimbra Collaboration Server is the most capable open source email and collaboration suite available today. Far outstripping what is possible with simple open source mail servers, Zimbra provides organizations major productivity boosts with global address lists, shared calendars and document management on the web or offline with Zimbra Desktop. Support for standard protocols enables use of virtually any desktop client or device for added end user flexibility.
Installation and administration is straightforward; all the interdependent components required by Zimbra are packaged within the server, eliminating any integration work by the administrator and management of the system is easily performed using the rich AJAX Admin Console. A vibrant community of IT experts, who are capable of handling most technical questions, supports Zimbra Collaboration Server Open Source Edition.

OpenVBX

The open-source nature of OpenVBX can be a little confusing. Like WordPress, OpenVBX is a downloadable software package that you upload to your own server and are free to tweak as much as you’d like. However, unlike WordPress, which offers a hosted solution at WordPress.com, Twilio isn’t offering a hosted service yet (though it’s quite obvious that they’re working on launching one in the future). For the time being you’ll have to host it yourself, though Lawson notes that Dreamhost currently has a 1-click install setup, which should make things pretty simple.
Of course, OpenVBX relies heavily on Twilio’s service, tapping into Twilio SMS and telephony APIs. When you use OpenVBX you’re charged Twilio’s normal rates, which run $1 per phone line per month ($2 for a toll-free number) with usage charges of 3 cents per minute (or SMS). Lawson says that it is technically feasible for someone to use OpenVBX with a backend other than Twilio, but that it would take quite a bit of configuration.
Twilio has always been focused on catering to developers, and OpenVBX isn’t any different. While the product will obviously appeal to businesses, Twilio is encouraging developers to take the technology and make it their own by integrating tweaks and plugins. For example, an enterprising developer could tweak OpenVBX so that it’s perfect for restaurants, and then resell it as their own service. Twilio still gets paid through their per-minute and phone line charges, and the developer can charge a hefty premium on top of it.

Free BSD Unix

Free BSD Unix is an advanced operating system for x86 compatible (including Pentium and Athlon), amd64 compatible (including Opteron, Athlon64, and EM64T), UltraSPARC, IA-64, PC-98 and ARM architectures. It is derived from BSD, the version of UNIX developed at the University of California, Berkeley. It is developed and maintained by a large team of individuals. FreeBSD offers advanced networking, performance, security and compatibility features today which are still missing in other operating systems, even some of the best commercial ones.

Dynebolic Linux

Dynebolic Linux is shaped on the needs of media activists, artists and creatives as a practical tool for multimedia production: you can manipulate and broadcast both sound and video with tools to record, edit, encode and stream, having automatically recognized most device and peripherals: audio, video, TV, network cards, firewire, usb and more. You can employ this operating system without the need to install anything, and if you want to run it from harddisk you just need to copy a directory. It is optimized to run on slower computers, turning them into full media stations: the minimum you need is a pentium1 or k5 PC 64Mb RAM and IDE CD-ROM, or a modded XBOX game console - and if you have more than one, you can easily do clusters.

Elive Linux Operating System

Elive Linux is a complete operating system for your computer. It's the perfect choice for replacing your proprietary, high-cost system. It is built on top of Debian GNU/Linux and customized to meet your needs for a complete operating system while still offering the user eye-candy, with minimal hardware requirements. It will help to turn your old computer into a high-powered work-station again, with an Interface that dazzles everybody that sees it. Elive comes with a full suite of applications for your work and leisure time needs. It offers everything from a full Office suite to games and Multimedia. You can enjoy watching movies or listening to music. You can even make your own DVD movies with menus, music and it works. Elive gives you the ability to make 3D animations, or compose your own movies in a real-time non-linear video editor from simple videos taken with your video camera. You can edit and manipulate audio and image files for better quality, effects, or design. Elive is a very stable system that will continue to run day after day without problems. The Enlightenment desktop is ultra-fast and perfectly stable with no random errors or surprises. There are no viruses, trojans, spyware, adware, or any similar things. Elive is a secure and serious system.

Debian Linux

Debian Linux is a free operating system (OS) for your computer. An operating system is the set of basic programs and utilities that make your computer run. Debian uses the Linux kernel (the core of an operating system), but most of the basic OS tools come from the GNU project; hence the name GNU/Linux. Debian will run on almost all personal computers, including most older models. Each new release of Debian generally supports a larger number of computer architectures. Almost all common hardware is supported.

Open Source Operating Systems

Suse Linux is a worldwide community program sponsored by Novell that promotes the use of Linux everywhere. The program provides free and easy access to openSUSE. Here you can find and join a community of users and developers, who all have the same goal in mind — to create and distribute the world's most usable Linux. openSUSE also provides the base for Novell's award-winning SUSE Linux Enterprise products. The goals of openSUSE project are to make openSUSE the easiest Linux distribution for anyone to obtain and the most widely used open source platform. Provide an environment for open source collaboration that makes openSUSE the world's best Linux distribution for new and experienced Linux users.