I'm making a dungeon-crawler-lilke game using c++, SDL2 and libphysfs.
I use VIM as my code editor ( with YCM, CtrlP, Ack.vim and other nice stuff ).
git for version control/backups.
Aseprite and GIMP for graphics.
Audacity, sfxr and lmms for sound/music.
A4 office paper + pencil for planning and sketching.
Also, I record my work process using vokoscreen. But the last hour recording went down the holes because vokoscreen crashed, though :)