I took a quick look which was all I had time for. I tried many different tools before settling on a combination of MLO (MyLifeOrganized.net) and a very simple TiddlyWiki of my own. If you haven't seen it I think MLO is worth a look because it seems to me to be the most flexible and most attractive GTD tool and it would be my point of reference for a comparison. I run it on Windows and Linux (using WINE) and on my Android phone.
What MLO isn't is free and open source and completely platform independent (runs on IOS but not OSX). A use case that is an unmet need for me at the moment is a simple free tool for facilitating the work of the management committee of a building, and I know of dozens of residents' associations/management companies who share the need and who are currently making do with various combinations of shoeboxes, paper, spreadsheets, word documents, email (in particular), box/dropbox, google calendar. I'm sure there must be many similar use cases -- clubs with little or no money and the like, whose members do not all use the same operating systems. At a glance, the interface seemed a bit like a cockpit with a lot of information and options that might be daunting to someone not already familiar with it or with GTD ideas (I recently saw and liked, I think it was in NoteSelf, a Simple/Advanced button to hide some details). I will keep an eye on it and if I can find time to provide more specific suggestions on, perhaps, simplifications (e.g., for the case described there's really only one area: the building). Other quick comments: I'd avoid the word tiddler and use card (e.g,. blank card). My committee isn't familiar with TiddlyWiki, nor all native speakers of English. A focus on "we" in place of "I" would better reflect a shared agenda. Realms aren't needed at all. -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/a654ce48-e557-4b67-9540-449dd0c628b4%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

