Mashboard supports the following types of widgets:
Display Emails from one or several accounts.
Supports: Gmail, iMAP
Display a list of files stored on various services.
Supports: Dropbox, Google Drive
Display a list of events from your calendars.
Supports: Google Calendar
Display a list of contacts for quick referral.
Supports: Google Contacts
Display relevant items from your notebooks.
Display a list of tasks and to-dos.
Supports: Basecamp, Wunderlist