JoyShockMapper 3 and future releases can now be found here. This is because Electronicks has taken over development of JoyShockMapper. I'll continue to be involved, but make sure to follow future development on his JoyShockMapper page.
If you want to know more about the handover and why this is good news, check out this post on GyroWiki.
JoyShockMapper converts DualSense, DualShock 4, JoyCon, and Pro Controller input into keyboard and mouse events so you can play PC games with those controllers. At its initial release, JoyShockMapper raised the bar for gyro controls and introduced the flick stick control scheme, allowing players to enjoy games with more precision and agility than ever before with a controller. JoyShockMapper is frequently updated with new features, and is useful for changing how games are played.