Extra cash

You've already had some useful stuff from folks about (Triond, etc.), so I won't repeat those. I have a question for you instead: Are you looking for revenue share, low-income easy stuff or actual freelance work? I mean, how much effort are you willing to make and what kind of timescale are you looking at for the income (and what level of income)? If you can answer that, it'll be easier to suggest possibilities.

I spend my spare time doing online work to have some supplemental income. There are many different ways online to make some money, and you can choose based on your preference. For me, writing is my preferred way, writing articles, short stories, reviews, and so on. There, one of my favorite sites is "Review Stream". You can write brief reviews there on a variety of topics and get paid once the review submitted is approved. If you like online writing, you might want to take a look at that site.