Space-In-Time for Mac

From TRI-EDRE:

Space-In-Time is a brand new program designed to analyze the space occupied by data on your disks and how it evolves over time, alerting you when the size of a disk or folder exceeds specified thresholds. Space-In-Time periodically records the used space for each folder on your disks, and saves a history of values and totals. A graph of these values can be displayed, allowing you to quickly and easily see where space is being used on the disk (for example, System, Applications, Caches, Pictures, ...), and to see variations on the disk over time (caused by a disk or folder suddenly increasing in size). Space-In-Time makes managing and controlling space on your disks so much easier.

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