TealPhone for

From TealPoint Software:

A drop-in replacement for the Standard Address Book, TealPhone offers a superior interface and numerous convenient and invaluable improvements, making it the ultimate contact manager.
Enhancements include a one-screen integrated display, eye-saving large number view, quick seek index bar, recently-used city and country memory, powerful search features, TealPrint summary, entry and label printing, and switchable sorting by first name, last name, and company.
Also supported is phone number dialing through integrated phones, modems, phone add-on peripherals, and cabled and infrared GSM cell phones. TealPhone is PalmOS 5 compatible.