Video Tutorials:
Screenr - Web-based tool to create screencast (less than 5 minutes in duration)
Jing - Screenshot and screencast software
Explain Everything - iPad app to create tutorials
Awesome Screen Shot - Chrome extension for creating screencasts
Present Me - Free online presentation software

Comic Tutorials:
Comic Life - Software for creating comic tutorials
Daring Librarian Blog Post on Comic Life Tutorials
Tiff's Collection of Creative Commons Comic Tutorials
Gwyneth's Collection of Creative Commons Commic Tutorials