I have been using Taskpaper on and off for the last couple of years. Especially whenever I want to break all my todos from various projects down into the smallest possible tasks, I always resort to Taskpaper.
Version 2 has been out for a while and it didn’t seem as there was much development going on. But in recent weeks Jesse Grosjean spoilered some screenshots and details about version 3 on Twitter and just now released the first preview version. And while it is still in preview, it’s just $9.99.
From my perspective it seems to be quite stable and still plays nice with nvAlt. And I must say I like the new layout quite a lot. Looking forward to where this is going.