"Simple Digital" - time/date steps/goal using a 7-segment display like font:
https://apps.garmin.com/en-US/apps/734e4b48-deb4-4beb-be8c-0a78fb538378
"Simple Big" - time/date steps/goal with a large skinny font.
https://apps.garmin.com/en-US/apps/3d8dd9a3-a90c-45b0-8170-043161dfc26f
"Simple Round" and "Simple Round 2" - analog watchfaces for the new forerunner 23x and 630. Simple Round 2 allows choice of 10+ Color Schemes!
Simple Round
https://apps.garmin.com/en-US/apps/92fc8af8-8b4c-4f20-9fdd-7fe084625d96
Simple Round 2
https://apps.garmin.com/en-US/apps/18ce2197-d4dd-4ebc-af71-be3f7bbfc9e1
"Simple Binary" - time/date in binary, step goal percent and other status leds!
https://apps.garmin.com/en-US/apps/a9df2600-e9c5-4d6d-99f3-30aef98558e0
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Initially, they are for the vivoactive (expect Simple Round and Simple Round 2) and the fr23x and fr 630.
These watchfaces support "user settings" to change color schemes and options.
Here's a very good thread about how to use the "User Settings" feature:
https://forums.garmin.com/showthread.php?332843-How-to-App-Settings