Positive Grid:
BIAS FX 2 – Award-Winning Guitar Amp & Effects Software:
BIAS FX 2 Guitar Tone App (Apple App Store)
IK Multimedia:
AmpliTube – Virtual Guitar Rig
Other Great Apps For Guitar Players & Musicians:
Hokusai – Audio Editor (iPhone) Import and edit any audio, record your music with built-in mic, line in, USB or Lightning.
GarageBand (iPhone)
(More coming soon)