The Center for Adult English Language Acquisition
A nice site funded by the U.S. Department of Education that includes fact sheets, FAQs, articles, and links to other resources.
Center for Multilingual Multicultural Research
This site by the University of Southern California is a wonderful collection of links to numerous other sites relating to ESL learning.
English as a Second Language. National Institute for Literacy Special Collections
A collection of resources for instructors, literacy practitioners, program administrators, researchers, adult learners, and other stakeholders in ESL education. It contains tools for teachers, discussions lists, and information about news and events regarding ESL education.
Literacy Connections -- Bilingual, Spanish, & ESL Literacy Resources
Literacy Connections provides links to information on reading, adult literacy, teaching techniques, and ESL literacy. The website also has links to organizations supporting bilingual literacy.
Teachers of English as a Foreign Language
This website is dedicated to ESL teachers. It contains ESL lesson plans, teacher forums, reviews of recent ESL-related books, and links to other ESL websites.