Lefty Cartoons by Barry Deutsch
All of his cartoons are governed by a CC-BY license.
Noise to Signal by Rob Cottingham
Cartoons can be used under a CC-BY-NC license and a linkback to the homepage is required.
Coders by Pello Xabier Altadill Izura
These cartoons are licensed in terms of a CC-BY-NC-ND license.
Callous – The Comic Strip by Carlo Jose S. San Juan
The cartoon strip is licensed in terms of a CC-BY-NC-ND license.
xkcd by Randall Munroe
This cartoon series is licensed in terms of a CC-BY-NC-ND license.
In the Sandbox by Vicki Jacoby
These cartoons are licensed under a CC-BY-NC-ND license.
Gaping void by Hugh MacLeod
The cartoons on this site is available under a CC-BY-NC-ND license.
Lukesurl.com by Luke Surl
These cartoons are available under a CC-BY-NC-SA
Inkygirl Comics for Writers by Debbie Ridpath Ohi
The comics are licensed under a CC-BY-NC-ND license and a text credit (“Used with permission from Debbie Ridpath Ohi at Inkygirl.com.”) would be appreciated. Please note the following from the site: “If you plan to make my comics a regular part of your publication or site, please contact me first. If you plan to feature my comics part of your brand (even if you’re non-profit), contact me first; this includes user icons.”
These comics are available under a CC-BY-NC license.