jOOQ is the best way to write SQL in Java
Graphs for Everyone
Compile-time Language Integrated Queries for Scala
Functional JDBC layer for Scala.
:leaves: Non-blocking, Reactive MongoDB Driver for Scala
A tidy SQL-based DB access library for Scala developers. This library naturally wraps JDBC APIs and provides you easy-to-use APIs.
A data access library for Scala + Postgres.
Specification of the Cypher property graph query language
Embeddable persistent & in-memory key-value store - www.SwayDB.io
Flyway SBT plugin
Mockup/testing JDBC & MongoDB driver (or Chmeee's son on the Ringworld).
Asynchronous database access for Scala and Java
Slick2 compatible blocking API for Slick3
Scala meta-DSL for the Datomic database
Scala and Java driver for FaunaDB
Type-safe SQL builder for Scala
Scala Driver for ArangoDB
Domain Oriented Database Mapping Framework for Scala
Type-safe and idiomatic Scala client for FoundationDB
Better JDBC wrapper for Scala