Python
- Django, ORM included in Django framework, open source
- SQLAlchemy, open source
- SQLObject, open source
- Storm, open source (LGPL 2.1) developed at Canonical Ltd.
- Tryton, open source
- web2py, the facilities of an ORM are handled by the DAL in web2py, open source
Read more about this topic: List Of Object-relational Mapping Software