Tests for functionality and flaws in TLS clients:

• Qualys (tests for ciphers/protocols, OCSP stapling, SNI, compression, mixed content, ...)
• How's My SSL? - Tests various things, amongst them 1/n-1 record splitting (BEAST mitigation) (code)
• TLS POODLE
• HSTS/HPKP
• Superfish/Komodia/Privdog by Filippo Valsorda and here
• Diffie Hellman parameters
• Mixed Content, another one here
• RSA PSS signatures (not widely supported, test partly borked)
• Reverse Heartbleed
• FREAK attack
• BERserk (code)

Wanted:

• Triple Handshake (Adam Langley had one, but took it down
• BEAST-mitigation record splitting
• Protocol dance without SCSV