Aloaha Signatur Validator
PDF and Certificate Validator. Incl. offline, online and OCSP revocation checks. Incl. Check Protokol Freeware!
http://www.aloaha.com/download/aloaha_validator.zip - 781Kb - Download - Screenshot

Aloaha PDF Signator
The Aloaha PDF Signator can sign any existing PDF Document. Aloaha does not require special prepared PDF documents or signature fields. The digital signature of the PDF file will automatically be checked and indicated by the PDF viewer (Acrobat Reader). ... The Aloaha PDF Signator is completely PKI neutral and will work with PKI components from any vendor (this includes CAs, certificates, CRLs, OCSP responders, smartcards, etc. ... Any number of users can countersign the same PDF document. ... (freeware feature) Timestamps via remote RFC 3161 Timestamping Server or inbuilt RFC 3161 TSA...
http://www.aloaha.com/download/aloaha_signator.zip - 6Mb - Download - Screenshot