Hepta Slab is a slab-serif revival based on specimens of antique genre types from Bruce and Co., primarily Antique 307. The family is a variable font which consists of 10 weights with the extremes intended for display use and the middle weights for setting text.
To contribute, see github.com/mjlagattuta/Hepta-Slab .
These fonts are licensed under the Open Font License .
You can use them freely in your products & projects - print or digital, commercial or otherwise. However, you can't sell the fonts on their own.
This isn't legal advice, please consider consulting a lawyer and see the full license for all details.