guitarLayers - guitarLayers is a professional macOS guitar learning software.
Guitarix - Guitarix is a simple Linux Rock Guitar Amplifier for https://alternativeto.
Fachords - Fachords is an online site that provides many resources that you can use to take your guitar skills to the next level.
Ampire - State Space Modeled guitar amp/cab/stompbox simulator.
Gitarrero Beginner - Gitarrero Beginner is a multi-featured, and easy-to-use guitar school developed as a guide to help you learn guitar skills and play them comfortably.
TH-U - World class guitar amps and effects for PC and Mac