A. Phone-Free Services    
Companies offering pc-to-phone and pc-to-pc calling services.

Dialpad.com - u.s... pc-to-phone, pc-to-pc; charges for international calls.
FreeWebCall - u.s. & canada.. pc-to-phone; download software and start calling.
Go2Call - international.. pc-to-phone; all plans have minimal charges.
iConnectHere - international.. pc-to-phone, pc-to-pc; multiple payment plan options.
MediaRing.com - international.. pc-to-phone, pc-to-pc; charges by the minute.
Net2Phone - u.s... pc-to-phone; internet answering machine.
PalTalk - international.. pc-to-pc calls, video conferencing, and voice mail.
pc2call - international.. pc-to-pc; charges for pc-to-phone calls.
PhoneFree.com - international.. pc-to-pc calls; video calls and premium services available.

B. Unified Messaging Services    
Bringing online faxes, voicemail, and email together in one package.

efax.com - free.. recieve faxes and voicemail through email.
HotVoice.com - free.. email, fax, voicemail; fees charged for additional messages.
j2.com - free.. fax, voicemail, calendar; premium for sending.
MaxEmail - free trial.. transforms your computer into a personal, digital messaging center.
Onebox.com - free.. voicemail, email, fax; fees for sending and other services.
uReach - free.. fax, voicemail, email; option to buy additional minutes.

C. Long Distance Carriers    
Long distace marketplaces, comparison services, and carriers.
AT&T - carrier.. offering a variety of long distance plans.
BetterCallingPlans.org - comparison.. unbiased and objective info on service providers' best lans.
Envoy Telecom - comparison.. compare long distance, satellite, wireless and internet plans.
Essential - comparison.. shop for and purchase long distance and other utilities.
GetConnected.com - comparison.. shop for the best long distance rates.
LowerMyBills.com - comparison.. compare rates and annual savings.
MCI Worldcom - carrier.. national and international long distance and more.
Qwest - carrier.. great deals on long distance plans for your home.
SmartPrice.com - comparison.. get a quick or detailed anaylsis of long distance plans.
Sprint - carrier.. offers general, nightime, and international plans.
Verizon - carrier.. offers a selection of money saving plans.
 

D. Online Answering Machines    
These services will answer your calls while online, and play you the message instantly.

CallWave - free.. answering machine and fax services.
Internet Call Manger - $5/mo.. internet call waiting service, caller id, and voice mail.
Pagoo - $5/mo... internet call waiting service.