Star Frontiers is a percentile system using d10 and d100 rolls.

d100 Macro with Modifier

Make a d100 roll and ask for a modifier.

/r (1d100) + ?{Mod|0}

The same as an Inline Roll.

/em rolls a [[1d100 + ?{Mod|0} ]]

Example output:
C'hting rolls a 47

Initiative

This is a inline-roll macro for Initiative, it adds the result to the Tracker (make sure you have a token selected).

/em rolls initiative [[1d10 + ?{Mod|o} &{tracker} ]]