ZDBSP

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 1.12:
 * 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)