YaBook is a powerful PHP 5 guestbook that features easy installation and customization, multi-language support, an administration interface, moderation of new submissions, and URL obfuscation. Various database systems are supported. The script auto-detects a new installation and performs incremental upgrades if required.
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.
Electronic Engineering Tool is a Web-based tool that includes an electronic formula calculator and converter functions. It very useful when working with electronics, both for engineers and amateurs. For example, it includes converters for dBm-to-Watt and Fahrenheit-to-Celsius, and it can calculate Ohm's law, filters, thermal resistant C/W, SWR, coil inductance, capacitor capacity, and more.
Software Engineering Environment (SEE) provides an information manufacturing platform for software development. It makes information sharing very convenient by allowing all information to be customized dynamically and letting users modify or add their own information structures at any time. It provides various predefined selections for information attributes that correspond to information manufacturing patterns. Although designed for software development, it could be used for managing any information, including book registries, personnel lists, and financial reports.