I realised that there was one piece of software I’ve been using that hadn’t rated a mention here.
GTDTiddlyWiki has two major changes to the original. One is to add a number of pre-created tiddlers for ‘Getting Things Done’ and the second is adding the ability to print to 3 by 5 index cards.
I now have one copy that gets carried around on a thumb and one on each of my computers that is used to just jot a quick note. Highly recommended.