Science Nest is the first platform that gives researchers the option to license/sell their research code or supporting materials.
Signing up as a researcher on Science Nest is completely free.
For free code, Science Nest is hosting your code for free as well.
If you choose to set a price for your code/supporting materials, Science Nest charges 15% of each selling transaction.
In case the buyer returns the code for any accepted reason, Science Nest will charge the author the PayPal fees.