Taskwarrior is written in the speedy C++ language.

Taskwarrior has many front-ends, services, extensions, hook scripts, and capsules available. Taskwarrior keeps a list of contributed tools on their site.

Commands are simple to recall as they are written like natural language.

The command line interface puts powerful filtering expressions, context, annotations, tags, due dates, reocurrence, and user-defined-attributes totally in your hands. It’s fast and low friction.

All properties using dates can be specified in various formats.

You can build scripts to take lines beginning with "Todo:" and pass the contents into Taskwarrior to programmatically generate tasks from meeting notes, for example.

As such, they are very portable across different systems and devices as long as they can open a plaintext file.

When used in conjunction with the Taskserver, it can sync tasks (conflict-free) across your Taskwarrior devices. This includes integration with Mirakel.

It has UTF8 support and is translated into many languages.

Taskwarrior has many front-ends, services, extensions, hook scripts, and capsules available. Taskwarrior keeps a list of contributed tools on their site. You can do tasks, projects, notes - pretty much anything.

tasksh will run interactively and provides functionality like 'review', to go through all pending tasks and update them. Great for housekeeping.