What can you get for nothing? All products featured here are independently selected by our editors and writers. If you buy something through links on our site, Mashable may earn an affiliate commission. Credit: Bob Al-Greene / Mashable Almost everyone, at one time or another, gets the urge to find a fun fling , but not everyone wants to dish out money for the privilege. If you're strapped for cash or just want to keep your credit card information to yourself, know that there are a lot of great free hookup apps and sites out there that will work just fine without you paying a premium for membership.  That having been said, not all these free services operate in the same way, or give you the same amount of freedom.…