Everything uses "jQuery":http://api.jquery.com/. GroupServer provides jQuery via "gs.content.js.jquery.base":https://source.iopen.net/groupserver/gs.content.js.jquery.base/summary. It currently provides version 1.9.1.
GroupServer provides "Bootstrap":http://getbootstrap.com/ via "gs.content.js.bootstrap":https://source.iopen.net/groupserver/gs.content.js.bootstrap/summary. It currently provides version 2.2.2.
Loader is provided via "gs.content.js.loader":https://source.iopen.net/groupserver/gs.content.js.loader/summary.