The Calendar You've Been Waiting For
This app action adds a percent complete indicator to the resizable event box based on a custom calculation. The existing event color is used to indicate the percentage that is complete, and a lighter version of the existing event color is used to indicate the percentage that is left on the task or project.
The app action lets you define a custom calculation that takes two custom fields, and calculates a number from 1 to 100. If your event has an overage, the app action also provides you the ability to indicate overages using an overage color as well as an overage border color.