redsn0w is the current jailbreak utility made available by the iPhone Dev-Team. It's free of charge, updated often, and generally considered one of the best, safest ways to jailbreak your iPhone, iPod touch, or iPad.
- 0.9.13 dev 4 - Mac, Windows
- 0.9.13 dev 3 - Mac, Windows
- 0.9.14b2 - Mac, Windows
- 0.9.13 dev 2 - Mac, Windows
- 0.9.13 dev 1 - Mac, Windows
- 0.9.12b1 - Mac, Windows
- 0.9.10b6 - Mac, Windows
- 0.9.10b5c - Mac, Windows
- CLI 0.4.3 -Windows
- 0.9.10b4 - Mac, Windows
- 0.9.10b3 - Mac, Windows
- 0.9.10b2 - Mac, Windows
- 0.9.10b1 - Mac, Windows
- 0.9.9b9d - Mac, Windows
- 0.9.9b9 - Mac, Windows
- 0.9.9b8 - Mac, Windows
- 0.9.9b7 - Mac, Windows
- 0.9.9b6 - Mac, Windows
- 0.9.9b5 - Mac
- 0.9.9b4 - Windows
- 0.9.9b3 - Mac, Windows
- 0.9.9b2 - Mac, Windows
- 0.9.9b1 - Mac, Windows
- 0.9.8b7 - Mac, Windows
- 0.9.8b6 - Mac, Windows
- 0.9.8b5 - Mac, Windows
- 0.9.8b4 - Mac, Windows
- 0.9.8b3 - Mac, Windows
- 0.9.8b2 - Mac, Windows
- 0.9.8b1 - Mac, Windows
- 0.9.6rc16 - Mac, Windows
- 0.9.6rc15 - Mac, Windows
- 0.9.6rc14 - Mac, Windows
- 0.9.6rc13 - Mac, Windows
- 0.9.6rc12 - Mac, Windows
- 0.9.6rc11 - Mac, Windows
- 0.9.6rc9 - Mac, Windows
- 0.9.7b6 - Mac
- 0.9.7b5 - Windows
- 0.9.7rc8 - Mac, Windows
- 0.9.8rc7 - Mac, Windows
- 0.9.7b4 - Mac
- 0.9.7b3 - Mac
- 0.9.7b2 - Mac
- 0.9.7b1 - Mac
- 0.9.6b6 - Mac, Windows
- 0.9.6b5 - Mac, Windows
- 0.9.6b4 - Mac, Windows
- 0.9.6b3 - Mac, Windows
- 0.9.6b2 - Mac, Windows
- 0.9.6b1 - Mac, Windows
- 0.9.5b5-5 - Mac, Windows
- 0.9.3 - Mac, Windows
- 0.8 - Mac, Windows
- 3.0 - Mac, Windows
Source: iPhone Dev-Team