Resources - Favorite jQuery plugin of the day

That's great! Thanks for sharing.
There's a bunch I use, I will start with one for today, jquery.filestyle :
http://www.appelsiini.net/projects/filestyle
Makes styling the file input a whole lots easier. Styling the file input is more of a hack, with different solutions for different browsers - the sort of thing you don't want to do manually.

Kassem wroteJCrop is actually a very useful plugin. I'm going to use it on my current projects to allow users to crop uploaded images on-site. Unfortunately, it's not being updated at all so I'm kind of hesitant about it. Do you know of any other plugin that does the same thing?

I used imgareaselect for that. JCrop seems more refined, but imgareaselect works, I can tell you that!