An addon that tracks your kills during the current honor session and displays in unit tooltips how many times you've killed a player and what percentage of honor the next kill will net you.
Also displays your total gained honor (after DR) for the session under the honor-tab.
Known issues:
Currently only works for english locales. (haven't found the honor gain strings for other languages)
Can be off by a few honor points when compared to what is in the 'yesterday' stat. (Suspected due to blizzard's internal rounding of displayed honor)