VigCal 2.5.1 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The software is included in Productivity Tools. We recommend checking the downloaded files with any free antivirus. The actual developer of this free Mac application is VigStore Co., Ltd.
From the developer:
VigCal is an organizer for your tasks, events and notes. It is an all-in-one calendar with rich advanced features. The application supports multiple calendars and color codes. The tasks and the notes are integrated with calendar events. You can see events, tasks, and notes in all views: day, week, month, or list. The tool allows you to group the events, the tasks, and the notes by calendar, date, manual, or context.
You may want to check out more software for Mac, such as DaliClock, TimeMachineGrowler or BigBen, which might be related to VigCal.