The Internet is constantly changing, and sites are popping up every day, and others are disappearing every day. Please try not to be too disappointed if some of these links turn out to be dead. It is sure to happen. If you don't get to one, go on and try another.

I'll try to give a few words of description for each site that I recommend.
Please don't be put off by languages. Figure it out. Some of the Japanese or Chinese website makers, for example, know very well that many people aren't likely to be able to read their languages, and they include instructions in the form of numbered sketches or even step-by-step photographs.

Paper Craft Maker (modern) Trains and a few buildings

Yamaha Papercraft : Animals, birds, motorcycles

3D Paper Model Studio Civi Cheng, his brother Alvin, and their friends. Don't miss this site. Cars, planes, trains.

http://www.3dpapermodel.com.tw/ Civi Cheng's work again. Amazing guy. Never mind the Chinese language. As a matter of fact, you can ignore everything on the page but this: Look just under the scissor at the top left, and just under there you see a button 'HOME' in English. The very next button to the right is the free download section, which has about a gazillion models of all kinds. When you get there, scroll down to the bottom of that page, and you'll see that there are a lot of pages. Active gang of people. Very nice models. I did a praying mantis that I got there. The links could go most anywhere in the world; in almost every case you just click on the picture at the left. Again, please don't let language scare you. Even if you get to a site where you can't read anything at all, you can still hover over links, and look at the status bar at the bottom of the browser window to see what the link points to. If it points to any kind of a picture file, jpg or gif or png or tif or what, it can't hurt to have a look. Also if it's a pdf file. If it's anything like that, right click and "Save target as..." rather than left click. If it's a webpage (htm or html), right click and open in a new window, to preserve the links page. Then if you get lost in the new window, just close it.

http://www.avioncitosdepapel.com/ Avioncitos are paper airplanes (fold and fly). Papel is paper. Never mind the Spanish. There's not much text anyway. Good simple things that fly very well, including the Tube, which you wouldn't think would fly at all.

Huisman Historic airplane models from World War I and World War II. Not the easiest but not terribly hard either. What you want are the zip files. Some of them have an extra page called the "3D add-on page" or something. Always get it. Better to have more parts than you need. Some can fly a little bit, by tying a string to one wingtip and flying around in a circle. (I don't recommend this) Note - they say print out 100% - you might find that this is not possible. If you are in the U.S., your printer paper, which is 11 inches long, won't be long enough for European A4 paper, which is a little bit longer. Either disassemble the page and make more pages, or print out smaller.

Canon papercraft (the makers of Canon cameras and printers, etc. Good site, good models.

Currell Graphics - the site is not perfectly designed, some links don't work. But everything is accessible if you just look around - in association with every model, one link may not work, but somewhere on the page look for the word download. Historic aircraft and one good flying paper glider.

Various models of buildings, vehicles, airplanes. In French and English (compare the two for practice).

Locomotives Nice models but very small (N scale?). I downloaded a couple. If I would build them, I would enlarge them. You'll see a picture of a hand holding one of them. Tiny. They also have CDs for sale, each having about 10 models I guess, for about 15 GBP each (Great Britain Pounds are probably worth about $2, so each CD is upward of $30.) Never mind. The WWW is full of free downloads.

papertoys.com must have about 50 models of every sort. Airplanes, vehicles, even a Tyrannosaur. Some models are very easy. Beginners can do them.

One good Fold And Fly paper airplane. Spanish, but follow the step-by-step pictures.

Science Fiction - at least one free download of an incredible machine. Also a come-on to join a Yahoo Club of paper modelers.

www.worlds-smallest-air-museum.com. Several freebees, including the non-powered Wright brothers' glider. Also, there is one called sailplane. I haven't built it yet, but I think it looks like one of the good ones.

Scale Model Related Websites - Go to "Special Interest" - and on to "Paper models". (but look at other categories, too.

amigamaquette.free.fr/telechargement.htm French, but they know we aren't all french-speakers, so they keep the language simple. (no, telechargement is not "long distance telephone charges" It means download.) Very nice models. I downloaded the Morris Bullnose (Amiga ad) delivery truck. Haven't built it, but it is very similar to one that I did build. Nice design, including a box to keep it in. But this is another of those tiny ones. I am tempted to disassemble the parts page and make two or three pages and enlarge. (as a matter of fact, I just examined it, and it can't be printed out at full size. Even if it could, the completed model would be only maybe 2.5 inches long. Below a certain size, paper parts can be very difficult to handle.) (Give me some time on this. I'll come up with something that can be printed out, at least, and will be big enough to be easier to assemble.)(Remind me).

Good FAQ (Frequently Asked Questions) page at cardfaq.org/. While you're there, there are about a million free paper models at cardfaq.org/faq/freeb.html - their free download page.