Clone Hero - Clone Hero is a free rhythm game, which can be played with any 5 or 6 button guitar controller...

guitarLayers - guitarLayers is a professional macOS guitar learning software.

Osu - Osu is Music, Rhythm, Single and Multiplayer video game developed by Dean Herbert.

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.

StepMania - Rhythm game for Windows, Mac, and Linux.

Fachords - Fachords is an online site that provides many resources that you can use to take your guitar skills to the next level.