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my.vocabularysize.com to measure vocabulary size
Right, excellent and authoritative site with a really comprehensive set of resources.
Students: We have free audio pronunciation exercises.
http://esolworksheets.com free printable ready-made resources
http://questioncloud.com - An online assessment tool for teachers that groups ESL material into different concept groups and allows for frequent, quick assessing of students. Really helps you get a better picture of what your students are understanding and what they're not.
Any updates on this list, I'm almost done, btw It really did gave me a big help though.
Students: Are you brave enough to let our tutors analyse your pronunciation?
Some analogue learning games you might want to check out:

For adult learners: Truth or Dare for English Language Learners
Find out about it here: http://www.speekeezy.ca /

For kids: AGO
Find out about it here: http://www.agocardgame.com /

Post other cool analogue classroom games if you know of any.
I'm still quite new to Twitter but it is one of the best communities to get advice and the best resources. Follow #elt #esl #efl, make contacts, and get involved.
My current project www.englishlessonplanner.com is a free tool for creating, storing, finding and sharing lesson plans for use by English teaching professionals.
Teachers: We supply a list of EFL job vacancies
Another great site is http://mrsbaiasclassroom.blogspot.kr /
it includes free downloadable materials with lesson ideas and how they have worked in her classroom
awesome ideas