Signaturely - Super simple eSignature software
Adobe Fill & Sign - Fill and sign any form, even snap a picture of a paper form to fill out.
Woleet Sign - eSignatures secured by Bitcoin
DottedSign - The Best E-Signature Solution for Your Business
HTMLCSS to Image API - Convert HTML to an image (jpg, png, webp). Renders images exactly like Google Chrome. Works with PHP, JavaScript, Ruby, .NET and more.
INHUBBER - Contract management and digital signature platform