Jugglingdb - Multi-database ORM for nodejs: redis, mongodb, mysql, sqlite3, postgresql, arango, in-memory... - 1602/jugglingdb
SQL+.NET - More than an ordinary ORM, SQL+.
Sequelize - Provides access to a MySQL database by mapping database entries to objects and vice-versa.
Entity Framework - See Comparison of Entity Framework vs NHibernate.
SQLAlchemy - SQLAlchemy is the Python SQL toolkit and Object Relational Mapper that gives application developers the full power and flexibility of SQL.
usql - Universal command-line interface for SQL databases