Calgoo

Calgoo is a tool that lets you work with Google Calendar directly from your desktop, avoiding the need to keep loading the web interface in order to use it. Its main attraction lies in the chance to access the different calendars without having to be connected to the Net. So you no longer need an internet connection to organize your appointments. Calgoo also gives you a really easy way to search on your calendar, applying filters and organizing your meetings into groups. Also, it is compatible with the Google Calendaring sharing, allowing you to organize events together with your family, friends, colleagues, and so on.