Some of these links are to little-known sites - have fun!

Fiction

Archive Of Our Own - multi-fandom archive with lots of B7 stories
Blake's Legacy - scripts for a sequel by Martin Odoni
Blake's Progress - scripts for a sequel by Jane Barlow
Character of Color - stories featuring Dayna
Delta Dome - Leia Fee's mostly Vila-related fiction

Reference

Blake's 7 image library - Lisa Williams' frame-capture images, searchable by character(s)
Blake's 7 Wiki - what it says on the tin
Sevencyclopaedia - Hermit guide to B7
Transcripts - episode transcripts
Writing Realistic Injuries - Leia's guide to hurting your characters properly