OpenHack is a highly popular, free, and open-source collection of hacks for Geometry Dash 2.2 on both PC and Android. Its key features include:

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.

The 2.2 version of Geometry Dash introduced several new features, including new icons, colors, and a much-anticipated level editor.