CogDogRoo - FindingPhotos
Tips for finding Creative Commons licensed images
KAVEWALL: STOCK PHOTOS
CC-By photos, mostly for textures. Lots of closeups of objects & nature (rock, fire, smoke, wood, glass, electric, etc.)
Sprixi - Free images to choose and use!
Visual search for public domain and Creative Commons images (only commercial friendly CC images are included)
Blank Cell Images - an album on Flickr
Cute idea for comics or scenarios--create scenes with lego people or other toys. These images are licensed CC-By-NC-SA. This photographer also has an album with some of the same images and talk boxes already added.
53+ Free Image Sources For Your Blog and Social Media Posts
Free image sources. Some CC, some public domain, some other licenses. Some sites require registration.
TheStocks.im
Search multiple free stock photo sites. Limited selection. Some images are licensed CC; check individual licenses.
Sites with High Quality Photos You Can Use for Free | CSS-Tricks
Free photos. This list includes a number of sites I haven't seen elsewhere. Many of these just share a few photos each week, and you'd have to be pretty creative to use them for most corporate e-learning. This isn't just typical stock photos.