SamTodo is a simple PHP application that makes managing a todo list as easy as possible. It allows for a prioritized and categorized listing of information ensuring that you won't forget important tasks again. The source code is easy to understand and the entire program is stylized using CSS (so it can be easily adapted to your needs). It only requires access to a Web server that supports MySQL and PHP.
DAViCal is a server implementation of the CalDAV protocol for storing calendaring resources (in iCalendar format) on a remote shared server. An increasing number of calendar clients support the maintenance of shared remote calendars through CalDAV including Mozilla Calendar (Sunbird/Lightning), Evolution, Mulberry, Chandler, and various other closed-source products such as Apple's iCal and iPhone. DAViCal supports basic delegation of read/write access among calendar users, multiple users or clients reading and writing the same calendar entries over time, and scheduling of meetings with free/busy time displayed.
METSlib is an object-oriented metaheuristics framework in C++ designed to make implementing or adapting models easy. The model is modular: all the implemented search algorithms can be applied to the same model. METSlib implements the basics of some metaheuristics algorithms, such as Random Restart Local Search, Variable Neighborhood Search, Iterated Local Search, Simulated Annealing, and Tabu Search. For each algorithm, you must implement an objective function, a neighborhood (move manager), and some moves. Tabu Search is one of the fastest ways to generate near-optimal solutions to a wide range of hard combinatorial optimization problems.
Email-reminder allows users to define events that they want to be reminded of by email. Possible events include birthdays, anniversaries, weekly, monthly, and yearly events. Reminders can be sent on the day of the event and a few days beforehand. It uses a cron job to checks for events and send reminders once a day, and a simple GUI that allows users to edit the reminders they want to receive.
CUON is an ERP system with a powerful document management system. The server runs on Linux systems. The client works on Linux, Windows, and some small PDAs like the Nokia N800. You can manage addresses, articles, projects, and so on. On some installations, more than 1,000,000 adresses are supported. CUON has its own report server to build documents and reports and a Web server for iCal and scheduling.