Original: TS5/TS6 pureIRCd RockIRCd RFC 1459 without linking ShadowIRCd TS6 with extensions solid-ircd TS5 with extensions Synchronet IRCd TS5 with extensions UnrealIRCd DreamForge/TS5 with extensions WeIRCd modulesmanager.
Simplified: TS5/TS6 pureIRCd ShadowIRCd TS6 with extensions solid-ircd TS5 with extensions Synchronet IRCd TS5 with extensions UnrealIRCd DreamForge/TS5 with extensions WeIRCd Features IRC server features, mostly extensions to RFC 1459.