Curio 4 continues to prove that the guys at Zengobi are willing to "think different". They re-think the whole concept of diagramming by combining it with really cool project organization functions. This has been going on in Curio for a long time now, but the new version has a refined interface, great new tagging and search functionality, new GTD style tools, a great new take on snippets for capturing data from all of your other apps, and really cool new mind-mapping functionality.

All that and the diagramming has gained some nice improvements too. The line drawing and support for connecting drawn objects via lines has some great new thinking in it too.

Overall this app is one of the most useful I own, and I use it every day... in fact I'm constantly finding new ways that it can fit into my workflow and general organization.

Kudos for Curio 4!