Sirius-Sign is a signing and verification server with it's focus on high throughput and easy integration into an existinig landscape. For signature creation smartcards with OCF and PKCS11 interfaces are supported. An EJB container is required.
HTML Purifier is a standards-compliant HTML filter library written in PHP. HTML Purifier removes all malicious code (better known as XSS) with a thoroughly audited and secure yet permissive whitelist, and ensure standards compliance.
Valid CGI Values is (currently) a XHTML forms based technologie for validating CGI values submitted by these forms. It consists of a form parser that analyzes web forms and a package with validation functions.