Picture Caller ID 

Picture Caller ID identifies callers before you answer the phone. Call Blocking enables effective telemarketer call block by cutting off black-listed numbers, such as the numbers that are blocked, out-of-area, or unidentified.
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Telemarketing Blocker 

Telemarketing Blocker is free Caller ID screen software that retrieves caller's telephone number using your voice modem (you must have subscribed Caller ID feature from your TeleCom. and your modem supports Caller ID in your local state).
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Call Alert! 

Call Alert! enables your PC to recognize the caller without the need to answer by announcing Caller ID information with voice, alerting you immediately when a new call arrives. Supports talking Caller ID, Call Block, and Windows XP style tooltips.
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CIDMage 

CIDMage - the first commercially-available all-software solution to the problem of generating your own custom Caller ID signals! Generates high-quality SDMF, MDMF, CWCID and more!
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PhoneTray Free 

Easy to use FREE Caller ID software - shows CallerID, speaks name and number, logs all your incoming calls. Reject any unwanted call, zap telemarketers with special tone or play Federal do-not-call warning to remove you from their lists - by law!
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IdentaPop 

TAPI Caller ID popup program that overlays the Caller ID over your screen and slowly fades away. Ms Outlook screen pops for IP phones (Cisco, NBX,ESI etc) and modems.
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