AdvSoft (http://www.advsoftvn.com/index.html) has released AweCal 1.0, an all-in-one calendar, task and note management application for Mac OS X (10.7 and higher). It costs US$27.99 and is available at the Mac App Store in the Productivity category.
AweCal is designed to help you manage day-to-day appointments, tasks and notes. Features include: day, week, month and list view; various filter modes; asmart scheduler logic to book task to calendar, checklist for any task/event; send / accept invitations, time balance; syncing functions; quick data entry and data manipulations; and more.
As a collaboration tool, AweCal supports a range of syncing possibilities: Events sync to iCal, Google Calendar. Tasks sync to Reminders, Toodledo, Google Tasks. All data on AweCal (Mac) can be synced to AweCal (iOS) via AweCal Cloud server. A web version of data on AweCal server will also be supported soon.