Bitsocket
Bitsocket is a powerful bitcoin push notification service for building real time bitcoin applications.
Overpool
Overpool lets you build your own off-chain bitcoin transaction ledger, which can optionally be shared over an overlay P2P network (DAT), in realtime.
1Sat Ordinals
1Sat Ordinals is a completely FOSS protocol which infuses individual sats with numismatic value at the atomic level of bitcoin.Each sat can now be inscribed with
Ledger Eye
A BSV data manager. Think Google Drive, but for Bitcoin.