Dolda Webmail (or d-mail for short) is a Webmail system written in PHP and interfacing with a back-end IMAP server. Advantages over most other projects of a similar sort are that it uses a persistant connection to the IMAP server (which increases performance on the Web server, reduces load on the network and on the IMAP server, and doesn't force the Web server to store the user's password in-core), and that it makes full use of XHTML 1.1 and CSS 2.
PGKAdmin is a stand-alone PHP script that allows you to maintain (add/delete/view/download) a Web-based GPG keyring. Such keyrings would be used in conjunction with any Web-based scripts or forms that allow GPG/PGP encryption. Note that this script does not allow you to create new keys, and you should not keep a copy of your private keys on the Web server. Use of this script should be limited to public keys. This script is not meant as a replacement for something more full-featured, but is intented to simplify the management of a Web-based public keyring for dynamic scripts on a Web site.
Presto Web is an utility that provides an easy, quick, dynamic, and intuitive way to generate a PHP Web site. It does not require a database, but uses text files to save the information, and generates HTML files to accelerate the server work. It includes an admin center and a wizard to set it up quickly.
The BTS (Ben's Task System) is a Web based task and time recording program. It is designed for multiple users, and it allows managers to view the tasks of their employees without messy paper. It has reporting features to view the tasks on which users have been spending their time.