Apps similar to Things include Super Productivity, which is free and open source. Other options are Notion, Trello, Todoist and TickTick. There's no shortage of Todo List Managers like Things, with more than 100 alternatives for the web, iPhone, Android, iPad and Mac.
Pinwork is a to-do app with native versions for iPhone, iPad, Mac and Apple Watch, and one purchase covers all of them. There is no Pinwork account to create.
Poland
EU
A task manager that shows which of your tasks are blocked by other tasks and which ones you can actually start right now.
Kubes has a simple but powerful concept that provides a general view where you can see everything you need to do.
SpainEU
GTD task manager that turns Inbox items into next actions or projects, filters work by context, time, and energy, guides daily and weekly reviews, links projects to goals and areas, flags stalled work, and syncs with calendars and other task tools.
Switzerland
Organize, Plan, and Achieve with Task GUN - Simple yet powerful to-do manager for productivity
Fast, private, and free PWA task manager & voice notes with zero-knowledge AES-256 encrypted Google Drive & Cloudflare sync.
United Kingdom
United States
Meteor has a simple dependency tracking system which allows it to automatically rerun templates and other computations whenever Session variables, database queries, and other data sources change.
