Keyczar has support for Java, Python, and C++ and uses the usual suspect standardized algorithms: AES, RSA, DSA, HMAC-SHA1. Google has been pretty active in maintaining Keyczar lately. ECC support should be added at some point.
As bascule said, NaCl / Sodium are using DJB's suite of algorithms, which are going to be faster and have smaller key sizes.
As bascule said, NaCl / Sodium are using DJB's suite of algorithms, which are going to be faster and have smaller key sizes.