Showbie is a great tool for keeping digital portfolios of students’ work
Coh-Metrix is a system for computing computational cohesion and coherence metrics for written and spoken texts
Lexile Analyzer can be used to compute the complexity of a text, including sentence length and word frequency
Cambridge University Press’s English Vocabulary Profile (EVP) “offers reliable information about which words and phrases are known and used by learners at each level of the Common European Framework (CEF)”
The CEFR-J website provides a series of “can-do” descriptors specifically for English language teaching contexts in Japan.