Maybe the best part of bash for me is AWK - so useful, and enjoyable to use. I use ffmpeg a lot for making movies from images, video conversion etc. I use Sage

Maybe the best part of bash for me is AWK - so useful, and enjoyable to use. I use ffmpeg a lot for making movies from images, video conversion etc. I use Sage on the command line, mostly for programming in Cython and mathematical stuff with the Sage/Python REPL. It was 2.7GB (!) and comes with an absurd number of libraries and packages[0], mostly for maths and graphics. I started by using it in a browser notebook, but switched to the command line and never went back. [0] http://www.sagemath.org/links-components.html http://www.sagemath.org/links-components.html