Brunel and Betourney were signed to AHL deals last year so they were never really "Flyers". Their contracts expired at the end of last season. No clue where Betourney is. Brunel signed a deal with Peoria. Dan Murphy's contract was up over a year ago and he signed a contract with the Anchorage Aces for this season.
I know that Pletka was given a qualifying offer this year so the Flyers retain his rights. Kallio (I believe) was bought out and listed as an unrestricted free agent, so no one owns his rights as far as I know.
I think they also made a qualifying offer to Divisek to keep his rights (read: keep him from playing for another North American team) but I'm not positive.
And Skrobot, after being bought out two years into a three year deal, dropped off the North American face of the earth as far as I know.