- Spritestack - 3D pixel editor
- PicoCAD - another one!
- BoscaCeoil - simple music tool
- OverTheWire - cyber security games
- Trail of bits CTF guide - CTF and basic exploits guide
- Zardus' CTF tools - LOTS of CTF tools
- Ezgif - nice tool for gifs and spritesheets
- ImgOnline - pixel perfect picture resize tool
- Oldschool button maker
- Jodi.org - just go there. explore it yourself.