Win9x LFN API emulator for Windows NT 4.0
Win9x LFN API emulator for DOS
DIFF and PATCH utilities for DOS (has LFN support, but with bugs :-\ )
DIFF and PATCH utilities for OS/2
DIFF and PATCH utilities port 2 for DOS (bugfixed, without LFN support)
DIFF and PATCH utilities port 2 for Win32
DIFF and PATCH utilities port 2 source code
DN's part of Async Pro library