ZDBSP
From DoomWiki.org
ZDBSP is ZDoom's internal node builder. On September 11, 2003, Randy Heit released it under the GNU GPL v2 as a standalone program, so people could use it for non-ZDoom projects.
ZDBSP features as of version 1.14:
- Fast: it was designed to be potentially used every time a map is loaded
- Polyobject-aware: it splits sectors in a way that minimizes or avoids altogether many polyobject glitches
- Support for GL nodes
- Support for compressed nodes
- Support for UDMF maps (the only UDMF-compliant nodebuilder available)