Translate
This website allows you to choose any job you want to complete, provided it is available. You can get translating jobs on a first come, first serve basis. They pay by the word and they seem to have a lot of work available.
Tethras
Tethras is a company that works with mobile app developers. All their translation jobs are app related. If you are into apps and tech stuff, you will enjoy working for them.
TextMaster
With TextMaster, you have the option to choose between professional translation and semi-professional translation. For professional translators, the company will require a degree and experience in translation.
Gengo
Gengo offers translations in many different languages. The great thing about this site is that you can start as a semi-pro translator, and as you get more translating jobs, they give you the opportunity to take a pro test. If you pass the test, you will be able to get more challenging translation jobs and get paid more.
Lingosaur
This is a translation agency that gets jobs from all over the world. Just like many other companies, they will require you to pass a skill test before you get accepted.
Linguistic Systems, Inc
This company is a bit different from the others. They require a Bachelor degree, as well as a minimum of two years as a translator or interpreter.
They mainly specialize in pharma, medical, legal and IT translations.