Open source for Website Development

Hello Everyone!!
I was looking for softwares which may allow to develop a website by people sitting at different locations. I have come across some softwares (but these may not be what i was looking for..) -

1. Joomla
2. Joomlaperformance - for Joomla Extensions
3. Cakephp- Start Guide.
4. Moovum - Anti-spam software for Joomla websites
5. Elxis- Features, System Requirements, Getting started.
6. Mambos- Features1 2, System Requirements, Extensions.
7. Bigace- Content Management System.
8. Elgg- Make your social networking website. See demoSite, System Requirements, Available Plugins and beyond that, Extendable Features like:
   
   • Profiles
   • Activity Streams
   • Blogging / Microblogging
   • Pages
   • RSS / JSON
   • Widgets
   • Video
   • Social bookmarking
   • Groups
   • Access controls
   • Web Services API
   • Documents
   • Photo Gallery
9. EasyPHP- WAMP bundle (Windows, Apache, MySQL and PHP) + Plugins.
10. Pligg- more.
11. Prestashop- E-commerce shopping cart software, Introduction. 
12. SPIP