SQL+.NET
More than an ordinary ORM, SQL+.
8 Alternatives To SQL+.NET
Doctrine
An object-relational mapper for PHP that provides transparent persistence for PHP objects.
Entity Framework
See Comparison of Entity Framework vs NHibernate.
Gorm
Gorm .po file editor
Jugglingdb
Multi-database ORM for nodejs: redis, mongodb, mysql, sqlite3, postgresql, arango, in-memory… - 1602/jugglingdb
LLBLGen Pro
LLBLGen Pro: Using databases in your .NET code made easy. The entity modeling solution for Entity Framework, LLBLGen Pro Runtime Framework, NHibernate and Linq to SQL.
SQLAlchemy
SQLAlchemy is the Python SQL toolkit and Object Relational Mapper that gives application developers the full power and flexibility of SQL.
Sequelize
Provides access to a MySQL database by mapping database entries to objects and vice-versa.
peewee
Object Relational Mapper (ORM)