The Joy of Sync
This section covers compatibility with feature phones, we will discuss smartphones (Palm, Symbian, Windows Mobile, RIM) separately.
Kyocera has recently announced a new version of their Mobile PhoneTools. This version can Sync the KX 1, 2, 5, and 9 with Microsoft Outlook Contacts and Calendar over a USB cable. It also offers additional features like ringtone / picture transfer and modem dialer. A package including the software and a cable will sell for about $50 and should be available soon.
Motorola offers a version of Mobile PhoneTools as well, which costs $30. It is more full-featured than Kyocera's, since it can sync with Outlook, Outlook Express and Lotus Notes, and adds tasks in addition to calendar and contacts. It is compatible with a huge number of Motorola phones and can sync via USB, Bluetooth or IR.
Nokia offers a free PC Suite that will sync a large majority of their handsets to calendar and contacts from Outlook, Outlook Express, Lotus Notes and Lotus Organizer. Depending on the model, the software also offers additional features like ringtone uploads. In addition to syncing over a USB cable, PC Suite can sync many handsets via Bluetooth or IR depending on your PC's setup.
Sony Ericsson offers the Sync Station application to sync nearly all their phones to Microsoft Outlook over USB, IR or Bluetooth. It will sync calendar and contacts with all compatible models, as well as tasks and notes with most.
Samsung Easy Studio II, which is included with Samsung's mobile data kit, is supposed to sync PIM information with selected GSM models, however a product warning from Samsung states it does not work with Outlook.