Fantastical is essentially a Pro version of the Calendar apps that come pre-installed on Macs and iOS devices. It features a beautifully crafted user interface and a sophisticated natural language that allows you to create appointments by typing or dictating phrases such as “lunch with John every Wednesday”.
The Mac and iPad versions of Fantastical are well integrated with OmniFocus. Specifically, you can drag an OmniFocus project, group or action into Fantastical and an appointment will be created with a link back to the item you dragged. When creating the appointment, Fantastical will check to see if the OmniFocus item has an estimated time associated with it and, if it does, the length of the appointment will automatically match the estimated time. This can be very convenient when blocking off time for specific projects and actions.
Tip: Even though the OmniFocus drag and drop functionality is currently only available on the Mac and iPad, links to OmniFocus projects, groups and actions that are contained within appointments will also work on iPhones.