CSS Peeper - Smart CSS viewer tailored for Designers.
Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.
Tailwind CSS - A utility-first CSS framework for rapidly building custom user interfaces.
Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.
Purgecss - Easily remove unused CSS
Strikethru - Strikethru is a kind of to-do list notebook for managing work lists and staying updated with the important tasks.