1. piskel - I sometimes use this to make blinkies/animated pixel art!
2. multi screen html test - use this to test your code on various resolutions & devices
3. cursors-4u - fun website with lots of cool cursors
4. proko's art library - a library of over 170+ free video art lessons + references
5. yestersearch - searches angelfire, tripod, and old geocities sites
6. best favicon masterpost by far