Ideally you need access to a news server, but if you don't have that you can subscribe thru Google Groups. In the newsgroups sci.lang.translation and sci.lang.translation.markedplace you can promote yourself and your services as well as finding contracts. Usenet newsgroups are free for everyone and has a lot of traffic, they provide an excellent alternative to the subscriptionbased jobsites.

Translators Cafe is nice and fast jobsite. However they delay job notifications to non-paying members.

Translatorsbase calls themselves an online registry of translators an agencies, but they also charge.

GoTranslators restricts non-paying members.

Language123 restricts communication between clients and non-paying members.

ProZ works great and is a source of many assignments. This is the site to be a member of if you consider the return on investment. Delays notifications to non-paying members.

Aquarius, strive to be the market leader in online translation outsourcing for translators, translation agencies and industry clients. However, I have never got one job thru them.