From Secure Soft:
PDF Signer main function is to sign PDF documents using X.509 certificates. Using this product you can quickly sign multiple PDF files (bulk sign) by selecting input and output directory. This is ideal for bulk signing of large number of corporate documents rather than signing each one individually. PDF Signer allows you to sign PDF documents without any need to purchase full Adobe Acrobat or Adobe Document Server for Reader extensions.This dramatically reduces the Total Cost of Ownership (TCO). Signature Verification - Verify digital signatures within your PDFs by simply clicking them. The validation results are provided in both summary and detailed manner consistent with Adobe Reader 7. Configurable Signature Appearance - PDF Sign Tool provides a fully configurable appearance for its digital signatures. The positioning of the signature appearance is configurable, plus on which pages of the document it should appear (first page or last page).