GTD lightweigh but effective tools

Some time ago I started reading about GTD "philosophy". GTD is easy to follow and effective in your day by day. In my case it helps me a lot at work, improving my organization and the problem resolution. Like other methodologies the difficult isn't in the methodology itself but in ourself, that is, we now what are the "right steps" but forgot to follow them.

Here I point three little tools can help with your day by day (applying GTD):

• MonkeyGTD
• d3
  
• GTDTiddlyWiki

All three are based on the TiddlyWiki (imagine a HTML page that modifies itself). In the case of 'd3' you have an util calendar to put your reminders.