Ruby on Rails
From IFORS Developing Countries OR Resources
Ruby on Rails is open source software, so not only is it free to use, you can also help make it better. More than 4,500 people already have contributed code to Rails. It’s easier than you think to become one of them.
Link to website: http://rubyonrails.org/
- Up to date information about the software in this list, which is mostly free to use, can be obtained from this link