Apaleo is a Property Management System which is purported as an Open PMS. It provides API access to all its users and vendor partners as well as an App rich marketplace where customers can choose from over 200 Apps to improve their PMS.

Postgres also known as PostgreSQL, is a free and open-source relational database management system (RDBMS) emphasizing extensibility and SQL compliance. It was originally named POSTGRES, referring to its origins as a successor to the Ingres database developed at the University of California, Berkeley. In 1996, the project was renamed to PostgreSQL to reflect its support for SQL. After a review in 2007, the development team decided to keep the name PostgreSQL and the alias Postgres