Zebra's Toggle Sneak&Sprint by BlauesZebra
Sneak and sprint keys behave as if they can be locked into the pressed state and unlocked by pressing them again. The function can be enabled/disabled ingame by pressing other configurable keys. Have a look into the Controls section.
Zelda Sword Skills Addon by willer111
This is a ZeldaSwordSkills Addon, which adds some items ZSS didn't.
ZenStages by artdude543
Advanced CraftTweaker Classes to allow making Staged Modpacks that much easier.