1. Bemani maps (MEGA) link
2. grumd's pp farm site
3. FunOrange's on-the-fly map stat changer
4. Clean up osu! song folders (bg's etc.)
5. Webpage with a list of links to various tools
6. osusearch.com
7. bloodcat
8. Higu's Jump Training
9. Google docs - Jumps
10. Google docs - Short Streams
11. Google docs - Singletap
12. Google docs - Streams
13. beatmap packs

1. Piotrekol's collections editor for recovering beatmap db with collections
2. BPM Changer
3. osuskinner
4. osuMissAnalyzer
5. osuReplayAnalyzer
6. osu! Multi commands (lobby creator can use)

Other stat tracking sites:

1. osu!track
2. osu!stats
3. osu!skills
4. osu!chan
5. pp+