I am going to develop an Islamic Q&A website for the Freebasic platform. Will that be beneficial for me on Judgement Day, and will that be counted as my Neki in Shariah?
I think that it depends on the content. If it's correct, then the output will be positive. But, if it's the opposite then you will regret this step. My advice is:
Think several times before posting anything, and be sure about it authenticity form several sources.
Always cite references, to give the readers the opportunity to verify.
Get your posts examined by a specialized person when it's necessary, in order to be "certain" about it.
Every time it's possible, try to give different types of reasons to justify your answers. Because the reader might be a Muslim, a new Muslim, a non Muslim, ...