I mostly do so in Common Lisp, which gives me the performance of C with the productivity of Python, and the ability to extend the language with macros. But, having used it for nearly 20 years exclusively, I have recently started looking for other languages, primarily to learn all the different ideas there are out there.
Nothing complete enough, or interesting enough worth publishing yet :)
I'm a researcher mostly, so just like to implement cool graphics techniques in academic papers :)
Haven't made much of anything I would call an application, but I would like to one day.
From IRC (bridge bot)
<riza> I can't imagine being productive in a Lisp... I always have to sit and stare at the screen for 3 hours before typing a line. But it's a neat language, and I imagine if I spent the time on it maybe that 3 hours would shrink a bit...