LSO Developer Community Manager
LSO SDK Home Pages (MEF Wiki login required)
LSO SDK Extensions @ GitHub (MEF Members only)

MEF LSO Sonata SDK Extensions

MEF LSO Presto SDK Extensions

MEF LSO Legato SDK Extensions

MEF LSO Cantata SDK Extensions

If you are a MEF Member, provide your GitHub account name to the LSO Developer Community Manager and request access to the LSO SDK Extensions repository you are interested in - otherwise you'll get a 404.