There are many e-mail packages available allowing excellent control over your mail. Eudora from Qualcomm is extremely popular. It comes in both freeware and commercialware flavors. Chat Software Chat software allows you to type to other people on the Internet in real time. Excellent if your computer is not equipped to handle sound for Internet Telephones.
PowWow has to be highly recommended as the best chat software around.
Best of all, it is all free. WinTalk is supposed to be compatible with the TALK feature on many internet access providers. You can try to use WinTalk if the other party only has text access to the Internet. So far, I have only found one whiteboard application available free on the Internet. You can use many of these applications at the same time with one or more people.