Zorro is a simple to-do list manager. The program allows you to set up a tree of actions starting from an (invisible) root and going down to as many levels as you specify. Associated with each action is a descriptive note, a done/ not done flag, an optional priority and an optional completion date. There are quite a lot of configurable items - look at the file DOTzorrorc for further details.
This release supports multiple levels of tasks, so you can just have a single level todo list or have a much more structured hierarchy.
Available at: [L1 ] (2011-12-17 dead link)
Alternate link: ftp://ftp.tcl.tk/pub/tcl/mirror/ftp.procplace.com/sorted/packages-7.6/apps/zorro-1.1p8/index.html