Harlowe Audio Library
Free tool for managing audio files with Twine and Harlowe
Blog posts
E-learning by Tracy Parish | ZEEF
Large collection of free tools and resources in many categories
Jennifer Valley: Free (or Cheaper) Tool and Resources for eLearning (February 2015)
Inexpensive or free tools and resources for animation, audio, graphics, course development, and more
10 eLearning Freebies: Instructional Design and eLearning: Tips, Advice and Reviews
Free templates, sound effects, graphics, and more
Free Music Archive
Over 10,000 free mp3s for download, all CC licensed