vWorker is the right place.
I've been working for about two years in vWorker. I've tried some other websites, like freelancer.com with no success.
Here is a comparison between vWorker and some other freelance websites:
For employers
For workers
It has some advantages (to me) over other websites. For example:
When you bid in a project, other coders cannot see your bid.
It's good because it increases (or avoid decreasing) the price of the projects.
Just imagine some coder asked $50 for a project. Then you may ask $45, and another coder $40 to obtain it...
In others websites, I've seen how price decreases from $500 to $150 (because of this)
There is a really good arbitration system.
- When you're accepted by an employer to work on a project, he/she puts his/her money in vWorker. It means that if you complete the project before deadline, then you can be 100% sure you'll get paid.
- There are lots of projects coming up per minute/hour. In this moment, there are 2,432 open projects.
I suggest you something:
No matter what site you choose to start working on: Be good in what you like/do.
It's true: there are lots of coders in those freelance sites, but lots of them only have the basic knowledge of a few topics. It means that they won't be able to work in a medium-difficult project (no matter if it is a small or a big project). Maybe they're not able to work on a .NET/Java project that requires modeling a really big database, working with some other websites APIs, or develop a driver to read/write an Ext2 filesystem/partition using Fuse in C under Linux ;)
Of course, there are lots of good people too, but what I've experienced is that it's not the majority.
Good luck with that.
Happy freelancing ;)
Edit:
The first time I visited vWorker, I wasn't too interested in the projects I saw. Then I didn't visit the site anymore for about a month. One day, I started visiting it again to see if there was something interesting, and I realized about something:
There are lots of new projects each day, and very often, when you visit the site, you're seeing only a few projects of that day, because lots were already awarded to some coders. The point is that you should visit the site frequently in the same day, because the projects you might be seeing, could be the less interesting projects. In fact, there are really older projects where the people who posted it won't award them to any coder, just because they don't really care about it anymore.