This site allows ELL students (or teachers of ELLs) to simply copy text from a reading, test/quiz, or just about anything by copy and pasting the text into the site. I recommend it for adapting and modifying resources you already have.
This site allows teachers of ELL students to show the students culturally authentic photos.
I found this site to have plentiful resources which can aid ELL students with vocabulary development. For example, they have a word skill cloze generator that provides different skill levels dealing with synonyms, antonyms, past tense, rhyming, categories, etc...