Widely used commercial systems that provide functionality comparable to the Calendar Tool include
Each of these systems provides a wide variety of grade managing and browsing functionality. In terms of such functionality, the goal for the Grade Manager is to provide the important core features found in these tools, not the full range of features found in all of them. The Grade Manager does provide modest functional improvements in three areas, when compared to most commercially available tools.
A detailed review of each related tool follows in these subsections:
Following these reviews, a summary of the features is provided in a feature comparison matrix.