If you are unsure what to download and would like to have a look at jCore and or install it for only one site you should download jCore Server from the Releases folder below.
Releases
Sun, 19 Jul 2009 01:10:40 BST by pijulius
These are the official releases of both server and client jCore systems. Releases usually contain new features and fixes, for updates, security/bug fixes please see the Updates folder.
Modules
Sun, 19 Jul 2009 01:10:56 BST by pijulius
Modules are self powered classes that will extend your site to be more powerful and add further features to it like a Photo Gallery and so on.
To learn more about modules please see About -> Modules.
Updates / Fixes
Tue, 21 Jul 2009 22:56:20 BST by pijulius
Updates are uploaded when there is need for them and usually fix bug and/or extend features already implemented. Older updates then the current jCore release should be already included in the new jCore release.