there is a new development version of TheTool. Check it out, 'cause it got many new features like full mouse support, customizable entities etc !
The Tool is a customizable map editor which you can use for your own games. The application is completly written in C++ with the QT-Toolkit v2.3.
TheTool is a highly customizable map editor. You're able to write exporters / and importers via LUA scripts in the future. It will also be possible to create customized entities via XML files. Check out this release and please support the project via contributing code, suggestions etc.