Centos

CentOS is an Enterprise-class Linux Distribution derived from sources freely provided to the public by a prominent North American Enterprise Linux vendor. CentOS conforms fully with the upstream vendors redistribution policy and aims to be 100% binary compatible. (CentOS mainly changes packages to remove upstream vendor branding and artwork.) CentOS is free. CentOS is now accepting donations via PayPal, please click the button for more information.

CentOS is developed by a small but growing team of core developers. In turn the core developers are supported by an active user community including system administrators, network administrators, enterprise users, managers, core Linux contributors and Linux enthusiasts from around the world.

CentOS has numerous advantages over some of the other clone projects including: an active and growing user community, quickly rebuilt, tested, and QA'ed errata packages, an extensive mirror network, developers who are contactable and responsive, multiple free support avenues including IRC Chat, Mailing Lists, Forums, a dynamic FAQ. Commercial support is offered via a number of vendors.

Link: www.centos.org

Ubuntu

Ubuntu is a community developed, Linux-based operating system that is perfect for laptops, desktops and servers. It contains all the applications you need - a web browser, presentation, document and spreadsheet software, instant messaging and much more.

The Ubuntu promise

• Ubuntu will always be free of charge, including enterprise releases and security updates.
• Ubuntu comes with full commercial support from Canonical and hundreds of companies around the world.
• Ubuntu includes the very best translations and accessibility infrastructure that the free software community has to offer.
• Ubuntu CDs contain only free software applications; we encourage you to use free and open source software, improve it and pass it on.

Link: www.ubuntu.com

Truecrypt

Free open-source disk encryption software for Windows Vista/XP, Mac OS X, and Linux

Main Features:

• Creates a virtual encrypted disk within a file and mounts it as a real disk.
• Encrypts an entire partition or storage device such as USB flash drive or hard drive.
• Encrypts a partition or drive where Windows is installed (pre-boot authentication).
• Encryption is automatic, real-time (on-the-fly) and transparent.
• Provides two levels of plausible deniability, in case an adversary forces you to reveal the password
  1) Hidden volume (steganography – more information may be found here).
  2) No TrueCrypt volume can be identified (volumes cannot be distinguished from random data).
• Encryption algorithms: AES-256, Serpent, and Twofish. Mode of operation: XTS.

Link: http://www.truecrypt.org/

Tor: anonymity online

Tor is a software project that helps you defend against traffic analysis, a form of network surveillance that threatens personal freedom and privacy, confidential business activities and relationships, and state security. Tor protects you by bouncing your communications around a distributed network of relays run by volunteers all around the world: it prevents somebody watching your Internet connection from learning what sites you visit, and it prevents the sites you visit from learning your physical location. Tor works with many of your existing applications, including web browsers, instant messaging clients, remote login, and other applications based on the TCP protocol.
Link: http://www.torproject.org/

Compiere

Compiere is changing the economics of enterprise applications by making Enterprise Resource Planning (ERP) and Customer Relationship Management (CRM) easier. Easier to acquire. Easier to implement. Easier to extend. Easier to change.
Easier, Adaptable and Affordable ERP and CRM
Compiere delivers powerful ERP and CRM capabilities that are built on an innovative Model-driven Applications platform.

Unlike traditional ERP vendors who recommend adapting your enterprise processes to match the default software settings, Compiere encourages you to customize your solution to match your business needs. The Model-driven Application Platform enables you to customize your ERP solution — quickly, easily and affordably — typically without programming.

Easier to Acquire
Compiere ERP and CRM software is easier to acquire through our unique open source business model. You are free to download, evaluate and use the open source version of Compiere without restriction. Compiere and its network of Authorized Partner provide a range of services to maximize the value of your Compiere ERP solution.

Easier to Implement
With Compiere, ERP implementation is easier because it provides both strong functionality upon software installation, and ease of customization to your business needs. What's more, Compiere provides a multitude of resources to streamline the ERP implementation process.

Easier to Extend
The Compiere Model-driven Application Platform makes it easier to expand your ERP solution to growing, changing and evolving enterprise needs

Easier to Change
Compiere is easier to change because there are no "final" decisions. Any element of the ERP system can be changed at any time without consequences in other parts of the application or to application data.

Openbravo

Openbravo is an open source ERP solution designed specifically for the SME (small to midsize firm). Developed in a web based environment, it includes many robust functionalities which are considered part of the extended ERP: procurement and warehouse management, project and service management, production management, and financial management.

Additionally, this same application seemlessly integrates the rest of the areas, starting with a management scope directly helping clients with its CRM (Customer Relationship Management) and BI (Business Intelligence).

Zen Cart™

Zen Cart™, the Shopping Cart Designed for Online Merchants

Zen Cart™ truly is the art of e-commerce; free, user-friendly, open source shopping cart software. The ecommerce web site design program is being developed by group of like-minded shop owners, programmers, designers, and consultants that think ecommerce web design could be and should be done differently.

Some shopping cart "solutions" seem to be complicated programming exercises instead of responding to users' needs, Zen Cart™ puts the merchants and shoppers requirements first. Similarly, other shopping cart software programs are nearly impossible to install and use without an IT degree, Zen Cart™ can be installed and set-up by anyone with the most basic web site building and computer skills.

There are hundreds of shopping cart programs available, but none come close to offering the level of options, features and support available with Zen Cart™. Even the commercial programs have a hard time competing.

Designed with shoppers in mind.

Developers and designers love it.

A long list of features.

Strong, growing, helpful online community.

Link: http://www.zen-cart.com