GPE-Todo is stable for production use and actively maintained and developed.
The source code can be found in SVN, module base/gpe-todo.
Distributions known to ship gpe-todo are:
GPE-Todo is distributed under the GPL.
GPE-Todo makes use of the GPE PIM data category library (libgpepimc) and therefore shares its categories with other PIM applications such as GPE-Contacts. It is able to display colours assigned to categories in the todo item list.
The application uses SQLite for data storage using libtododb which offers a simple API for managing todo items from different applications. GPE-Timesheet is able to work with these items as well.