A MIDI SysEx Librarian is typically a bare-bones software application designed to send and receive simple MIDI files.
The most commonly used librarians are:
- MIDI OX
- Bome's Send Sysex
- Snoize SysEx Librarian.
Most MIDI sequencers (e.g. Cubase, Sonar, Logic, DP, ProTools) also have built-in MIDI/SysEx librarian functionality.