It's time to update the entries in your browser's links toolbar. But with recent estimates putting the size of the internet at well more than 100 million distinct websites, it's getting harder and harder to get a handle on all the great stuff that's out there. That's why we've compiled this list. And unlike some lists you may have seen, which try to name the very "best" websites, but end up just telling you a lot of stuff you already know, we've chosen instead to highlight 50 of our favorite sites that fly under most people's radar. Think of it as the Maximum PC blog roll (remember those?). These sites represent great alternatives to popular web destinations like YouTube and Hulu, and include useful references, powerful web apps, and the unknown blogs you must absolutely bookmark.

You might have heard of some of these sites, but we'll bet you haven't heard of all them. Read on and find out. You won't be disappointed.

Demoscene.tv

See What Can Be Done with 4 Kilobytes

If you’re any kind of nerd at all, you probably know about the demoscene, where talented programmers create complex videos rendered in real-time, stored in incredibly small files. If you’re not familiar, you should make yourself acquainted with the scene, and all of the trippy, procedurally-generated content it has to offer. And hey, it’s not like you’re going to hit your bandwidth cap watching demos.

But what if you just want to see what all the fuss is about without actually downloading and running an executable? That’s where demoscene.tv comes in. Think of it as YouTube for the scene, letting you watch demos in HD on the web. And if you like what you see, the full demo executable is just a click away.

lite.Facebook.com

Clutter-Free Social Networking

You can admit it. Along with Twitter, Facebook is one of the sites that you absolutely feel compelled to check every day to keep track of your friends’ activities and latest funny links. But while we’re all for friend-stalking, we could definitely do without the AJAX-heavy sidebars and interface modules that clutter up the Facebook homepage. Try using Facebook Lite, which gives you lean views of friend feeds and your user profile. You get access to essential image and update posting functionality without being bothered by the newest Facebook game apps.

Letsplayarchive.com

Let other people play games for you

The Let’s Play Archive maintains a list of hundreds of “Let’s Play” games, where somebody plays through a video game while maintaining a journal using text, screenshots and videos. Some are funny, while other’s just give you a whirlwind tour of a game you’ve never played before. Sounds dumb? Give it a try, you might just find it more engrossing than you’d imagined.

Soyouwanna.com

What They Didn’t Teach You in School

If you’ve ever needed some advice on how to do go about doing the most obscure, but didn’t really know who to turn to without receiving some sort of critical feedback, So You Wanna is a great resource for inquiring minds that think alike. So you wanna…audition for American Idol? Bottle your home-made beer? Get a travel visa to a foreign country? So You Wanna tells you all about it and assists you in your quest to become the all-knowing. Note that there is some NSFW content floating around the site.

Google Building Maker

Crowd Sourcing the 3D World

14th Century cartographers would be right about Google Earth – its world is pretty flat. Despite high-resolution satellite imagery that lets you zoom in on your neighbor’s skylight, buildings are still part of one big flat surface. That’s where you come in. Google’s Building Maker is a website that lets you help design and create buildings for Google Earth. Using a plug-in based version of their Sketch-up modeling program, you can easily create a textured 3D model of your neighborhood or local landmarks and submit them to be included in the Google Earth database. The process is surprisingly simple and really fun to use. Google has rolled out the service to 50 cities so far, but plans on expanding its reach in the future.

Ikeahacker.blogspot.com

Outsmart the Swedes at their Own Game

If you’ve been a college student or 20-something living on a budget in the last couple decades, chances are good that there are a couple of bits of Ikea furniture gracing your living quarters. The Ikeahacker blog shows you how other people have transformed their old Swedish furniture into something awesome.