I am not an expert! These are just the idiosyncratic discoveries I’ve found useful. I’m always open to suggestions.

Construction Software & Apps

Crossfire (OSX and Windows – $50)

Crosshare (“free, ad-free, and open-source” online app)

Crosserville (Free, online app)

Exet (Free, open source, online app)

Word Lists

Peter Broda’s Wordlist (free, 600k+ scored entries)

spread the word(list) (free, scored, continuously updated)

XWord Info Word List ($50, scored, smaller but high quality. Not sure about the $200 Jeff Chen’s Personal List add-on.)

Resources for Construction

XWord Info (umm…this site has seemingly everything)