Open-source software refers to any computer software whose source code is made available, for free, for others to study, change, improve and redistribute it in a modified or unmodified form.
Open source is also a culture, since  it is usually developed in a public, collaborative manner. Since 2000, open source projects such as Linux, Firefox, and Open Office have been increasingly strong challengers to Microsoft and other major software vendors.

At HighProductivity, we've concluded that open source will eventually be the dominant paradigm for software production - which is not to say that it is the best choice for everyone right now - but many businesses have the opportunity to permanently lower their software licensing costs and overall IT bills. While the entry cost for open source is low, you often have to put in a little sweat equity to configure and customize the software to meet specific requirements, and this is where HighProductivity is devoted to serving the needs of companies who go open source - to provide on demand customization, implementation, training and programming for the following platforms.

Tikiwiki - a leading feature packed open source wiki CMS.

Drupal - a phenomenal content and knowledge management system with CRM modules.

Wordpress - an excellent and highly popular blogging and web development package.

Mediawiki - the original wiki software that drives wikipedia and thousands of other sites.