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.
Zen Mod Loader by WireSegal
Don't sweat it, let ZML handle your models. Mainly for modjams and stuff.
ZeroPoint's Teacher Appreciation Week Gift by Zero Point
Made during Teacher Appreciation week - in school, no less!