GoFun is an implementation of the Desktop Entry Specification found at freedesktop.org. It manages Icons that represent applications, links, and devices. So it is a desktop itself and can be used to start regularly needed applications and maintenance tasks. It is more than an application launcher, since it has many multimedia features and allows you to have a personalized desktop.
QTodo is a todo-list manager that was designed to help the user to actually get things done. You can add todo items to different lists, set priorities, the status of an item, deadlines, and more. Items can be sorted, filtered, copied, cut, and pasted. The lists can be printed to paper. It also features deadline management with alerts that you can fine-tune or just disable with a tray icon.