Free e-books no longer under copyright. Useful for study of classics.
A lot of language construction worksheets useful for revising problem areas. I used this regularly for my ESL classes.
Revision tool. Can make course of key words/quotes for students to study. Also available as an app.
Fun speed writing game that’s free to use on the website. Useful for writers block and brainstorming.
Free, downloadable writing software. It’s full screen and provides a distraction free environment for those who might have trouble writing on cluttered desktops.
Browser extension that restricts time/access on SNS and other distracting websites. Students are so overwhelmed by distractions online that this could be useful if they need help avoiding temptation.