Dave's ESL Cafe I have been using this site for more than 20 years. It has everything from worksheets to CVs. It also has a great forum for teachers to exchange ideas. It's probably your best starting point for finding a job.
BBC The original site has been archived but is still worth trawling through for lots of good links and ideas. This site has a link to the new BBC site which is updated regularly.
Developing Teachers This is a free site, but you do have to register. They send you lots of interesting ideas, but not so many that you hate them! Highly practical with good tips and resources.
TEFL.NET This is a well-established general free site. It has many useful links, including jobs, lesson plans and a teachers' forum.