+- battery percentage
+- cpu usage (in percent)
+- custom shell commands
+- date and time
+- disk numbers (free storage, percentage, total storage and used storage)
+- available entropy
+- username/gid/uid of current user
+- hostname
+- ip addresses
+- load average
+- ram numbers (free ram, percentage, total ram and used ram)
+- temperature
+- uptime
+- volume percentage + mute status (alsa)
+- wifi signal percentage and essid