Vroid - A free 3D character modeller
Borderless Gaming - Play your favorite games in a borderless window; no more time consuming alt-tabs.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
DxWnd - Windows hooker - intercepts system calls to make fullscreen programs running in a window, to...
DAZ 3D - Daz 3D, 3D Models, 3D Animation, 3D Software
Simple Runtime Window Editor (SRWE) - Allows you to pick a running application and manipulate size, position, styles of its main/child windows.