It depends of the scope of the game.
For "bigger projects" I usually go with C#/.NET and Monogame. Smaller/jam games are done with TIC-80, since it can export games to Javascript/web format.
Low-level stuff is usually done with just notepad, compiler and emulator.
Game Engines are usually just a Game Jam thing, but I'm thinking about trying Godot, since it's license allows complete freedom for development.
Graphic stuff is often done with Gimp and OpenMPT for audio (I suppose this is somewhat an outdated method, but I like it).