OpenID is a decentralized authentication protocol for web applications. OpenID users need share credentials with only one OpenID provider, and not every forum and network they log on to. This leads to a safer and more convenient Web. http://openid.net/
XSDB XML is to DATA as HTML is to DOCUMENT. Publish and combine data as easily as HTML format and web browsers publish and view documents. Implementations in Python, javascript, java, C#/.NET.
An ISP-class utility to allow FTP account holders to change their password independently using a web browser. Written in Python and Works with PureFTPd-MySQL servers where the PureFTPd FTP server uses a MySQL database for user authentication.
BLUSA is a set of shell scripts (mainly for Bash) intended to manage users accounts in bulk.
It is mainly based on createusers, from Linux For School Project (www.lfsp.org), but intended to be more modular, flexible and secure.
CGIgen is a collection of classes that are useful in data-encapsulation esp. for CGI-scripts. It also includes other classes that may be helpful in writing CGI-scripts.