Bookow barcode generatorbookow.com
FreeFree ISBN barcode generator for covers.
Web
Nielsen UK ISBN Store alternatives
4 isbn & metadata tools for self-published authors, similar to Nielsen UK ISBN Store. Compare pricing and platforms, then pick what fits your workflow.
Bowker (MyIdentifiers)myidentifiers.com
PaidOfficial US ISBN agency (single & bulk ISBNs + barcodes).
Web
Free retailer ISBNskdp.amazon.com / lulu.com
FreeKDP/Lulu/D2D provide free ISBNs (tied to their imprint).
Web
International ISBN Agencyisbn-international.org
PaidDirectory of country-specific ISBN agencies.
Web