Advanced Call Manager for Nokia S60.2 for Symbian

From Melon Mobile/WebGate:

The Advanced Call Manager unique feature is the ultra-fast recognition of remote callers which allows personalized replies (SMS, mute, reject, accept, greet, divert) to be attributed within a part of a second leaving the caller unaware of your current availability. The application rich functionality makes it a very convenient tool for any manager as it saves time by taking over the management of your incoming calls when you are too busy to do it by yourself. With ACM you can organize your phone book into custom lists like Black (people you don't like to disturb you), White list (important people which are 'allowed' to call you) or any other custom lists (a very special custom group could be your family to which you can wish to send a personal SMS if somebody calls you during a meeting). The application enables you to set different actions for the groups you have defined - you can accept, reject, divert calls, send personalized SMS, play personalized greeting or mute the ringer.