The latest release of Jetty is below, earlier minor release versions are available in Maven Central.
The most recent versions of prior Jetty releases can be found here, with their associated documentation.
Note: The canonical repository for Jetty is Maven Central. All releases are always available there first and this download page may lag a bit update wise as post release resources are put into place. You can always browse for Jetty releases here.
These are not for general use and are provided strictly for OSGI users.