redsn0w
Copyright (C) 2007-2012 by iPhone Dev Team

Additional Credits
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5.1.1 A5 untether:
   vulnerability: @pod2g, @planetbeing, @pimskeks
   exploit:       @pod2g, @planetbeing

5.0.x A5 untether:
   vulnerability: @pod2g
   exploit work:  @pod2g, @planetbeing, @saurik, @pimskeks, @p0sixninja, @MuscleNerd, and @xvolks

5.0.x untether:
   vulnerability: @pod2g
   exploit:       @pod2g

4.3.3 untether:
   vulnerability: Stefan Esser (@i0n1c)
   exploit:       Stefan Esser (@i0n1c)

4.3.2 untether:
   vulnerability: Stefan Esser (@i0n1c)
   exploit:       Stefan Esser (@i0n1c)

4.3.1 untether:
   vulnerability: Stefan Esser (@i0n1c)
   exploit:       Stefan Esser (@i0n1c)

4.2.1 untether:
   vulnerability: chronic dev team
   exploit:       chronic dev team

limera1n for iPhone 3GS, iPhone4, iPad, iPod touch 3G, iPod touch 4G:
   vulnerability: geohot
   exploit:       geohot

24kpwn for iPod touch 2G and early-model iPhone 3GS:
   vulnerability: pod2g, MuscleNerd
   exploit:       planetbeing, CPICH, posixninja, chronic, pod2g

steaks4uce for iPod touch 2G (MC model):
   vulnerability: @pod2g
   exploit:       @pod2g