ButterLib - catches (almost) all exceptions in BEW style and gives the ability to save the crash report
Useful Ui Debug Ex - Tool for UI modders. Add more useful info to UI debug window.
Quest Debugger - Mod that allows to start quest from native console and adds the Quest Debug Console that shows active quests instances properties and fields and their values.
Workflow
Useful Skips - start game fast, skip splash screens/intro/char creation/tutorial
Better Time - more options to speedup game time, good for testing