Continuum Level / Ini Tool
From ASSS Wiki
Continuum Level / Ini Tool, or CLIT, is an open source map / lvz / region / elvl data editor written in Java by 2dragons and Bak. It can be used to edit a map's tiles, as well as visually place LVZ-included images on your map, without manually editing .ini files. You can also visually display regions as well as save your name into the map as the creator. CLIT saves maps as Extended LVL Files.
The official name has recently been changed to ContinuumLT.