E-signing for contracts

Hello! I am a freelance copyeditor setting up shop. My question concerns contracts and getting both parties to sign. I know that I could probably get a scanner and have the client sign a scanned contract and send it back to me, but I'm trying to come up with a quicker way to do contracts that's the least involved for the client as possible. Has anyone had any experience with some e-signing software (either free or paid) that makes doing contracts easier? Or, perhaps, a different way of going about contracts that might be easier for the client?
I would appreciate any and all kinds of advice regarding this subject. Thank you!