VueMinder Lite USB is a free calendar app that can run from a USB stick or cloud drive such as DropBox. It can auto-sync with Google Calendar. A calendar browser allows addition of many events, such as holidays, local weather, sport schedules, religious occasions, and much more. You can also create your own calendars, which are overlaid into day, week, and month views. Events are also visible directly on the Windows desktop, even when offline!