Please note that OBLIGE is no longer being developed.
OBLIGE is Free Software, released under the GNU General Public License (GPL). Note that it comes with absolutely NO WARRANTY of any kind. Please see the gpl-2.0.txt document for all the legal stuff.
OBLIGE has the following features which set it apart from existing random map generators:
OBLIGE 7.70 supports the class DOOM family of games, i.e. Ultimate DOOM, DOOM 2, TNT Evilution and The Plutonia Experiment, as well as classic HERETIC. Version 4.28 of OBLIGE supports several more games, including HEXEN and QUAKE, although the levels are not as good.
I no longer develop OBLIGE and I don't want to answer any more questions about it.