ibantools
Validation, extraction and creation of IBAN, BBAN, BIC/SWIFT numbers plus some other helpful stuff like ISO 3136-1 alpha 2 country list
ibankit
Validation, field extraction and creation of IBAN, BBAN, BIC numbers
fast-iban
IBAN/BBAN validation and conversion following ISO 13616
ir-iban
Turn BBAN into IBAN, validate IBAN for iran banks