here is my personal list. Some of them needs Universal launcher to run. Please notice that some of them are not included in CSM and WFD. You need to change directly in XML
Have fun.
1 yearmonthday
2 monthday
3 month
4 day
5 weekday
6 hourminute
7 hour
8 minute
9 second
10 weather
11 temperature
12 steps
13 heartrate
14 baterylevel
16 year
17 battery arc
18 arc steps
19 moon phase
54 kcal
60 distance
69 bluetooth
70 GPS
71 Wifi
73 quitemode on/off
99 charging bat
100 tap action
101 Year Month Day (YY/MM/DD)
1001 distance
1002 distance unit (0=KM, 1=miles)
1011 temp unit (0=C, 1=F)