A few years back, I tested cyassl http://1nw.eu/!f8 for RSA computation (a friend of mine had patched it to remove a lot of malloc and optimize the code, something he couldn't do on openssl). It had interesting results compared to OpenSSL, but I haven't tried to use it with a real daemon.

Does anybody know if it would compile with nginx/stunnel/stud ? Results would be interesting.