ganttweb is a tool for publishing Gantt charts on the Web. It dynamically translates ganttproject (.gan) or GNOME Planner (.planner) files into HTML. You can also use the core of the program (an HTML file) as a template for building standalone Gantt charts in HTML format for desktop or email use.
LeadingProject is a project management application that increases your overall business performance through efficient planning and management of multiple projects. It offers a comprehensive managerial toolset for effectively starting, tracking, and reporting projects. It supports a workspace for several projects, a global resource list, MS Project XML support, unlimited tasks and resources, and Web-ready reports.
CalCore is an advanced, flexible calendaring component for Python. It allows the Python developer to write advanced calendaring applications either using their own event storage or integrating with external calendar servers. It features support for private calendars, shared calendars, resource booking, integration with iCalendar clients (Apple iCal, Mozilla Sunbird, KOrganizer) using the iCalendar protocol, invitation workflow, meeting support, including helper functions to look for free time, and recurring event support. It is being used as the core of Nuxeo's CalZope and CPSSharedCalendar products.