For old and deprecated releases, see download.jelix.org.
List of changes brings by each version, release dates, PHP compatibility and so one: this is on the changelog page.
Some modules and plugins for Jelix are available via Composer, from http://packagist.org. Some of these packages are automatically installed by the package jelix/jelix.
Some components of Jelix are available separately and usable without Jelix. Install them via Composer, from http://packagist.org. Some of these packages are automatically installed by the package jelix/jelix.
See the page independent-components.