While the functions I have listed here have all probably been listed elsewhere many times before, I have included them because I either use them a lot for quick reference or they are quite useful for specific things I have needed to do in the past.
Functions I have pilfered from various places around the web I have attempted to reference back where I could, however if I have missed anything let me know in the comments and I will reference back anything similar or better than what I have posted here.