hi,
the KG group of companies - http://group.kgisl.com/ have a open source department - one of their initiatives is here: http://fossible.kgisl.com/
I happened to visit the group and find they have done extraordinary things using open source. For example there is PAC which does online processing storage and rendering of scans and xrays - they have implemented it in php/msyql and have several TB of data at the cost of about 5 lakhs whereas other hospitals have shelled out 1.2 crores for the same. College ERP, construction ERP and an enterprise wide ticket managing system tied to a zimbra server with things like right-click on a ticket to approve it, or right click on a person's name to send him an sms. The have used sms extensively - like staff can take attendence in class using their cellphones and sms the result to the server.
There is an over reliance on php - but we are working to change that. Also they are yet to open source their applications - but that too is going to change.