Don't ask me about these since I use B3 for my server. You can find more/better ones on google/aIW forum..
Web RCON(php): alterIWnet • View topic - MW2 Web RCon Tool v1.0 Release
Ingame Rcon: alterIWnet • View topic - Ingame RCon Tool! V1.1
Alternative, B3: alterIWnet • View topic - B3, WAMP, XLRstats. All in one.