Orgtool is an extremely flexible organizer platform. It encourages creation of loosely coupled reusable components by combining Doqu's fantastic flexibility with Tool's approach to configurable extensible applications.
$ pip install orgtool
This won't give you a working organizer. Orgtool is a platform so you need to create a Tool project and include Orgtool's extensions as "bundles". Each component provides commands, controllers, URL rules and templates (not necessarily all of them). You can easily create almost any kind of organizer (from PIM to a Trac clone) by combining existing components (orgtool.ext.*), overriding their templates and writing your own components.
See the complete documentation for details.
Orgtool is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
Orgtool is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with Orgtool. If not, see <http://gnu.org/licenses/>.