- Baanzish by Rupert Barnes (123 features)
- Ba'eni by Justin Mansfield (59 features)
- Balaibalan by collective (0 features)
- bal'ukbar by 'amabery (87 features)
- Bannish by Eddie (9 features)
- Baranxe'i by MisterBernie (119 features)
- Barbane by arnick (143 features)
- Barip by penguinsquishy (18 features)
- Baronh by Morioka Hiroyuki (61 features)
- Barthian by Aamos W. J. B. J. Braazol van Sint Stephen (33 features)
- Başam by Owen Fish (Emelano) (109 features)
- Bashika by penguinsquishy (141 features)
- Batean by morganicfoods (91 features)
- Batu by Max Dominik Weber (35 features)
- Begonian by M.M. (123 features)
- Bengenese by danniel (45 features)
- Bhadlam by Flush (42 features)
- Black speech by Sauron(in-fiction), J. R. R. Tolkien(out-of-fiction) (13 features)
- Bleg by Bleg (0 features)
- Blissymbols by Carl Bliss, among others (0 features)
- Bologau by Zarainia (144 features)
- Bơlơn by IlL (76 features)
- Borchennymendi by Nilheau (143 features)
- Boriomanco by Becca (2 features)
- Brasarg by CivilixXXX (62 features)
- BreadSpeak by Jack Eisenmann (116 features)
- Briötto by Drew (29 features)
- Brithenig by collective and Andrew Smith (0 features)
- Brooding by Ryan Long, Scott Hamilton, BenJamin P. Johnson (70 features)
- Brutirric by Brv (63 features)
- Bryatesle by Miekko (109 features)
- Buruya Nzaysa by Jan Strasser (134 features)