I used #1, #3, #4, #5, #6, #7 and #10 in the past.
I now use 7-Zip in place of ARJ and JAR and use its 7z format for file compression of my own files. It can also uncompress RAR files.
As for Microsoft Encarta, it also included the equivalent of the HowStuffWorks website. For example, if you look up a refrigerator on Encarta, it has a video showing how its heat pump works to cool the interior.
Another reason software firewalls were popular was that most Internet connections went straight to the computer, especially in the days of dial-up Internet, so the operating system was exposed to all incoming traffic and connection attempts. The vast majority of Internet connections today are handled by a router, which means that unless the user has ports forwarded to the computer, incoming connection attempts will fail. Even when port forwarding is configured, most users don't open ports the OS listens on and these are the ones that use to be exploited such as by infamous Blaster worm.
Winamp was great and fairly lightweight while in versions 2.x and then became resource heavy once it hit version 3.x. I abandoned it once AOL took it over.