You can choose to download from either nightly builds (bleeding edge) or release update sites.
These sites can be used to install the TEA features into a running Eclipse. Currently no site is available (yet).
Nightly Builds (right click & copy)
TEA provides integration into several external components. These integration libraries require the external components to be present to be able to install them.
Eclipse EASE (for scripting support)
LcDsl (for launching support)