E*Reminders is a series of PHP scripts that interact with a MySQL database to setup email reminders for any events or occasions you'd like. It includes recurring reminders, advance notices, and password authentication for email addresses. It can be used for an entire company, as a service for Internet users on your site, or privately.
Tobedone is a Web-based Java applet project management tool which organizes complex projects in tree structures and offers you many manipulation tools. You can give specific tasks priorities, assign them to persons, create and delete databases, give permissions to users, sort project tasks by priorities, dates, etc, and a lot more.
ToutDoux is a project manager for GNOME. The approach of data manipulation is abstract (database free). It's extensible with plugins. Most tasks are and will be subcontracted with commandline frontends. The file format is XML (including a schema, plugins parameters, and datatables).
TUTOS (The Ultimate Team Organization Software) is a groupware, ERP (Enterprise Resource Planing), CRM (Customer Relationship Management), and PLM (Project Lifecycle Management) suite that helps small to medium teams manage various things in one place. Its features include personal and group calendars, an address book, product and project management, bug tracking, installation management, test management, scrum management, a task list, notes, files, mailboxes, and useful links between all of the above.
Bumblebee is a system for managing instruments and other resources (e.g. analytical equipment) that must be shared between a number of users. Bumblebee is designed to be more efficient than a wall calendar or a whiteboard for both users and administrators. Bumblebee is also able to generate reports of resource usage with breakdowns by user, research group, and research project.
i-net Clear Reports (formerly i-net Crystal-Clear) is a very powerful reporting solution. It can accommodate a broad range of reporting needs, from a simple standalone application to a really big enterprise Web solution. It can produce many different output formats like Java Viewer, PDF, HTML, PS, RTF, XLS, TXT, CSV, SVG, and XML. It can generate reports from many different data sources like JDBC, ODBC, Java API, JNDI Data Source, and without data.