Alec's Trebuchet
Pictures and Plans for a 27' trebuchet and plans on how to build small trebuchets
Algorithmic Beauty of Trebuchets
Free downloadable simulators of the detailed mechanics of trebuchets (a form of medieval catapult), available for the Mac and PC. Also available are two detailed essays on trebuchet and onager physics.
Build a Catapult - Catapult Design Plans
Read specifications for the design and construction of a medieval torsion catapult. View images and plans.
Grey Company Trebuchet Page
Information on medieval trebuchets and modern reconstructions.
Medieval Castle Siege Weapons
Focused on medieval castles, siege engines, knights and other aspects of medieval warfare.
Onager Online
Team Carbo's onager web site. Details on building onagers, and competing in Pumpkin throwing contests
Reconstructed Medieval Mechanical Artillery
Images and information on reconstructed projectile-throwing siege engines, including the trébuchet and traction lever engines.
Ripcord's Trebuchet Stuff
Nomenclature, how they work, parts, theory, plans, and photos.
Team Tormentum's Siege Engine Page
Several types of siege engines with lots of pictures.
The Trebuchet Page
This site is devoted to medivel seige, mainly trebuchets.
The Trebuchet resource
All about catapults, trebuchets, mangonels and onagers. Professionally engineered and authentic models and kits, videos, books, the hurler's message board, who's who registry, events, links, adventures and other fun stuff.