UPDATE JUNE 2017 - if you are looking for some great performing lightweight 90mm, 100mm, 120mm and 144m brushless frames, you cannot do better IMO than to visit the Rocket Quads store. I have built and flown some of these frames, they are the best I have come across.
2nd update - late June 2017 - if a product does not appear in the store, try searching by it's name to find it, there are website works in progress and some products do not show up in the store right now.
If you have any questions about a particular design here, feel free to email me. Basically this store is just a service to make available to other quad enthusiasts a few frames, a few bits and pieces, and some experimental frames from time to time.
If you want to learn to draw a frame to submit to Armattan, this video might help you.