Is there a way to add a digital signature field? Or use a tablet with the digital pen to sign a field?

Juiced has 2 add ons for capturing signatures.  The DocuSign integration mentioned above by Chad (thank you Chad) and a simpler one that you can demo right here.
https://juicedtech.quickbase.com/db/bhacsb6cf?a=er&rid=3&dfid=10

just click one of the buttons on the form from the link above to see how it works

Keith