• awesome-java
• awesome-kotlin and also here
• swift.ctolib.com
• An introduction to Vert.x, the fastest Java framework today
• javamagazine
• jdon

A nonexhaustive list of alternatives, most of those are for PostgreSQL only.

• JDBC - blocking
• Mauricio - deprecated
• vertex reactive-pg - uses vertex
• spring postgres r2dbc
• postgres-async-driver
• finagle mysql - part of a bigger project and uses scala