There was a similar post at

<< Computer science undergraduate project ideas

<< Ideas for Software Engineering Thesis Project

<< Senior computer engineering project ideas ?

<< Final Year Project(Software Engineering) Idea

So I read all of them and my answer wasn't fit to those.

Actually I'm looking for some ideas which

1 - Help me extend a functionality of Open source software (like creating a usefull add-in

2 - Let me Create a Scientific Paper (ideas to publish a scientific paper)

3 - Or Create a Unique an usefull application from the scratch , (like performance tool, profiler, analyzers and other similar tools)

I know C# - Asp.net and sql

So with all these conditions what do you think is better to do? let me know your ideas whatever those are.

any idea appriciated.