Any PhD Fellowships still taking applications right now for upcoming year?

[PFRevay]

I am a PhD student and I had some research funding lined up for the upcoming year, but it fell through at the last minute quite unexpectedly. So right now I'm frantically scrambling to secure some alternate funding. I'm on an F-1 visa, so off-campus employment is really not an option (apart from applying for OPT which takes months to process). This is why I am looking for dissertation fellowship opportunities as well. I know that most fellowships for a given academic year have deadlines early in the year, but I was wondering whether there are some with (very) late deadlines, or consider applications on a rolling basis, etc. My program as well as my dissertation project is on a cross-roads between the social sciences (sociology, economics) and computational sciences (think data mining/crunching, simulation and modeling), so I would be looking for something along those lines. Thanks for any tips.