- Holidays - Download links to iCalendar holidays.
- Skins - Download links to different skin libraries.
- Scripts - Various scripts to make Rainlendar more usable.
- Sync tools - Tools to sync your mobile phone with Rainlendar.
- Install license - How to install the license.
- Upgrading - How to upgrade Rainlendar to a newer version.
- Backup and Restore - How to backup your events and/or transfer them to other computer.
- QuickAdd - Creating new events and tasks from a string.
- Multiple calendars - How to display multiple months in the desktop.
- Per-window settings - How to apply the settings just to a single window.
- Multiple to do lists - How to create multiple to do list with different items.
- Templates - How to set the alarm automatically for new events.
- Month view - How to show event texts in the calendar.
- Debug log - How to enable the debug mode in Rainlendar.
- Google calendar - Show and edit events from Google Calendar.
- Custom categories - Define custom categories for the skin.
- Calendar colors - Set a color for the calendar.
- New Google Calendar - Solving the error 403 from Google Calendar