>>970954If you happen to be into mountain bikes too Linkage is also great program. You don't need to know the geometry as you can just trace over a photo, not super accurate but you can tweak it if you do know the specs as well.
Comes in handy for when you can't find specs on a frame, getting info that no manufacturer lists, and seeing how variables affect other things (e.g. head tube under different sag amounts front and rear, shock compression curves and how it varies with different mounting locations, rear wheel travel path, wheel base change due to suspension compression, etc.).
