Tandy DeskMate is more commonly known as a DOS-based graphical user interface which was popular around 1986-1993. However, versions for the TRS-80 Color Computer also exist. They have many of the same functions as PC/DOS DeskMate, but offer a different style which somewhat resembles early versions of GEM and Mac OS.
DeskMate 3 for the Color Computer features such applications as "Text", "Paint", and "Telecom". It has a calculator accessory which may be opened while any other application is running. Here is a look at its spreadsheet called "Ledger", which appeared at a higher resolution than some of the other screens...
This software first appeared in the 1987 Radio Shack catalog for $99.95 USD; it was reduced to $69.95 by 1989. The catalog listing called it "an integrated package of seven commonly used personal applications". Here are a couple more screenshots, showing the Color Computer DM3 calendar and calculator:
CC DeskMate 3's "Text" program is a word processor, while "Telecom" is a communications terminal. It also includes an "Index Cards" application (somewhat like DOS/PC DeskMate's "Filer"), which appears in the screenshot below. One configurable aspect of DeskMate 3 is the color scheme used for some screens...
This version was only for the Tandy Color Computer 3. The original CC DeskMate works on older Color Computers and has the same seven applications, though a less sophisticated interface. It was priced at $99.95 in the '87 catalog, $59.95 in 1990. Both versions entirely fit on a single floppy disk.