All of my games have been made in LÖVE. It's a desktop Lua based game engine (with support for Android and iOS coming out next release IIRC). All of my games are written in MoonScript (which is what itch.io is made in), which compiles down to Lua. There's nothing game specific about the language but it makes the syntax for Lua much nicer.
If I need to do any pixel art I'll use Aseprite
All the music I write is done in Renoise, it's a modern adaption of a music tracker. Music is written in a matrix instead of a piano roll or as sheet music.
I'm pretty bad at sound effects so I'll typically generate some stuff with bfxr.
For writing code I use Vim.
If I'm recording a timelapse I'll use gLapse.
And for hosting games... well naturally I'll use itch.io :)