Yes, Google is your friend, basically. That said, there are various libraries that implement a lot of generic, useful functionality. E.g. glib for data structur

Yes, Google is your friend, basically. That said, there are various libraries that implement a lot of generic, useful functionality. E.g. glib for data structures in a desktop application, libevent/libev/libuv for event-based programming, libpcre for regular expressions, various string libraries, SAMBA's libtalloc for a different take on memory management, etc. What are you trying to do?