A simple addon to calculate your gear level and determine what Instances you are qualified for. RRC will also show the gear level of the toons within your Party/Raid and calculate the appropriate instance level for the entire party.

/rrc toggle - opens the interface

Players need to be within inspect distance for you to capture their item level. This is a Blizzard API issue that I have not gotten around yet, if it is even possible. If you are within inspect distance and the score has not updated, you may need to hit the Manual Update button to re-scan the party. Once a toon's score is captured it is stored in the addon and will display even if the player goes out of range.

Keep in mind that the score is just an approximation based upon gear level. Please feel free to submit suggestions for upcoming versions.