Members only scheduer

[emediastudios]

Hi All, this is probable not the place to post this, but though this section may have someone in the know.

I am looking for a PHP member scheduler, with calendar for my existing site, or it can run independently, just want it so my client can add appointment times on a day on a calender for any member in an admin, and when the client logs in only sees his appointments,

Anyone know of a free open source php script, i will install a forum or wordpress if it is easier.

Thanks.