The Open Source DocuSign Alternative.

iText for Java represents the next level of SDKs for developers that want to take advantage of the benefits PDF can bring. Equipped with a better document engine, high and low-level programming capabilities and the ability to create, edit and enhance PDF documents, iText can be a boon to nearly every workflow.

Websocket based (NO APPLET) Smart Card Digital Signature Framework

A high-level utility for PAdES-compliant digital signing in Node.js. It facilitates the creation of placeholders, hash calculation, and integration with external signing providers (HSMs/APIs).