Libzdb is a database library with thread-safe connection pooling. The library can connect transparently to multiple database systems. It has zero runtime configuration and connections are specified via a URL scheme. A modern object-oriented API is provided. Libzdb supports MySQL, PostgreSQL, SQLite, and Oracle.
crpcut is the Compartmented Robust Posix C++ Unit Test system. crpcut (pronounced "Crap Cut") runs all test cases in their own process and their own working directory, which makes it perfectly normal to test that asserts do trap, and the test suite continues even in the event of an unexpected SIGSEGV. By using the C++11 features long available in GCC, the tests are extremely easy to write.
Safelock is a file-based locking primitive that provides mutual exclusion between unrelated processes and threads. It offers advantages over POSIX and BSD file locks such as: compatibility with multi-threaded applications, support for lock attempt timeouts, detection of crashed lock holders, and detailed lock status (PID, lock age, custom data).