WP-HeadlineAnimator

Easily add an author box bio signature with custom profile image and social profile buttons to the end of each author's posts

Professional PDF signature collection plugin. Upload fillable PDFs, collect signatures, and store signed documents securely.

Automatically adds a signature to your posts. Configurable via TinyMCE on the profile page.

A plugin to create, manage petition and collect signatures for petition inside WordPress environment.

FT Signature Manager allows your authors to create a signature to be appended to the end of their posts.

This plugin adds user signature support to bbPress 2.0.