Free (or very cheap if you want upgrades or cloud version) software for writers, including formatted templates for scripts of all kinds and integrated shooting calendars, production resources, etc
The history of English word usage. Fascinating for anyone who loves words but essential for anyone trying to vaguely keep things accurate in historical fiction. Also a little addictive.
Great for assembling scrap books of images - settings, moods, characters, inspirations, details, books, authors, booklists, etc. Excellent search engine of collective obsessions. Also addictive.