DeleD is a 3D modeler and level-editor combined into one. It focuses at game development and is specifically designed to create static scenes.
NOTE: a new webbased version called Figuro is available at https://www.figuro.io ! It runs in the browser, has similar capabilities and is generally easier to use.
Related project at https://sourceforge.net/projects/deled-plugins/, featuring DeleD plugins.
A Lazarus port is available in the repository as well.
Check out the official...
OpenJSGL reimplements key parts of OpenGL in JavaScript to allow 3D graphics in a Web browser without plug-ins. OpenJSGL uses the <canvas> tag as its viewport, and works in browsers that support <canvas>, such as Firefox, Safari/WebKit, and Opera.