Software I want (other people) to try

I find myself recommending software I’ve heard of but never tried with the desire to get other people to spend effort on making them work and letting me know if they’re worthwhile. I’m generally clear about that that’s what I’m doing, but still, it feels a little underhanded, so here’s an explicit list of (some) software that I haven’t gotten around to trying, would like to, and would appreciate comments about from people who’ve used them before:

All of these are, as far as I know, free software.

I’m sure I’ll think of more as time goes on (I already realized I forgot about the last couple within two minutes of writing this). Anyone have experience with any of these? Alternatively, what other potentially-nifty software have you heard of but haven’t gotten a chance to use?

2 August 2010
CC-BY-SA