Mahara
Resembles facebook in the following ways
- Its social site to connect to connect with friends
- You can provide information about you to others
- You have full management of your account e.g you can add and remove friends as you like
Quite complext installation intractions
PHP programming language is used
Java script platform needed 
Editgrid
Is online spreadsheep software, works just like excell 
PHP programming language used
Java script platform needed
Free License
wiki.metropolia.fi
Compared to forum sites
PHP programming
Java platform
Free license