How about Tracks? http://getontracks.org/ http://getontracks.org/ It's also based on the GTD philosophy, it's very easy to use and has some nice features. You

How about Tracks? http://getontracks.org/ http://getontracks.org/ It's also based on the GTD philosophy, it's very easy to use and has some nice features. You can find an online version here, try the demo first to see if you like it: https://tracks.tra.in https://tracks.tra.in