Chamilo comes in two flavours, the 1.* (or "LMS") series and the 2.* series (or LCMS).
Chamilo 1.9.6 - Rochefort
Release name: Rochefort
Prerequisites: PHP>=5.3, MySQL/MariaDB>=5.1
Release date: 04/06/2013
Chamilo is free software. Its development process is public.
Feel free to contribute on http://support.chamilo.org/
If you're a developer and you want to checkout the "live" source, check our Github repository
Chamilo 3 - Bradypodion
Version: 3 - Download it here
Release name: Bradypodion
Release summary: After a test run of nearly a year in several institutions the release is finally a fact. The basic concept is connectivity: content objects are published or shared from a central repository. More information and documentation on http://lcms.chamilo.org or via http://www.chamilo.org.
Release date: 30/04/2013