Guitar Rig 5 is currently free if you buy an audio interface from Native Instruments. The cheapest one is $109 so you can save $90 if you just buy an audio interface
Free Guitar Rig Alternatives: Top 10 Music Production & Similar Apps | AlternativeTo
Guitar Rig 7.0.1 Free Download for Windows 10, 8 and 7 - FileCroco.com
NI Guitar Rig 4
Stream Guitar Rig 7 Pro - Lazaro Porto by Plugin Alliance | Listen online for free on SoundCloud
Guitar Rig 5 Pro Ultimate Presets - Instant Download
Free Vst Fx - Guitar Rig Player (No Talking) - YouTube
Free Guitar Rig Alternatives: Top 10 Music Production & Similar Apps | AlternativeTo
Guitar Rig 7.0.1 Free Download for Windows 10, 8 and 7 - FileCroco.com
Free Guitar Rig Alternatives: Top 10 Music Production & Similar Apps | AlternativeTo
Best freeware plug-ins: Six of the best freeware guitar plug-ins | MusicTech
Guitar Rig 5 Player - Native Instruments Guitar Rig 5 Player - Audiofanzine