Input needed, spread around!

I want some debate, so feel free to post links to this.

I'm looking for the top eight implemented ideas that started the media-saturated Internet as we know today.  No, not the Internet itself.  The applications that jump-started things.

Why?  I'm doing a bit of furry artwork, sort of my view of "the god in the machine" inspired by momentrabbit's ponderings, a webcomic called Wigu, and kinkyturtle's own work.  I already have the representation of IPv4 and IPv6.  The current browsers will also have their own representation, but I'm looking for history.

Here's my own musings:

1. NCSA Mosaic, the first web browser that made an impact and begat Netscape and IE.
2. RealPlayer, the first streamable audio/video codecs.
3. WinAmp and Shoutcast, the first to bring streaming MP3 stations to the people
4. Linux, which made making a reliable server cheap.
5. Apache, the first good web server.
6. Perl, which made the web interactive (if by forms).
7. Javascript, which lightened the load.
8. Jolt Cola.  Yeah, a soft drink, but you needed the caffeine for those late code sessions.