Todolist is a small pure wikitext plugin, contain all tools to work with todo list.
https://kookma.github.io/TW-Todolist/
With Todolist, easily organise and prioritise your tasks and projects so you’ll always know exactly what to work on next.
Todolist creates custom UI and lets you to add new items, set priority, done/undone items, archive, delete. Using Todolist plugin it is possible to create several todo lists in one Tiddlywiki.