Moi 3d is a NURBS modeling program that is very easy to learn and it can output a variety of 2d and 3d formats. It has excellent support and a lively forum. The obj output mesh is not as neat as that produced by hand but there is at least one person using it to make game objects. A lot of people seem to use it for creating real objects via 3d print and laser cutting etc. I often make stuff in moi and paint it in 3d Coat. You could also make a high density mesh in moi and turn it into something that you could sculpt and retopo in 3d Coat. There is a free trial version to play with.
3d Coat allows you to model in voxels or surface mode, which is good for organic objects. It's reasonably easy to do use and you can paint and render your results. You can also map UVs and retopo and bake. This means you can make a high-resolution figure and turn it into a low-resolution model with the detail baked in. Again there is a trial version.
Simlab is really for showcasing designs and making 3d presentations so does not really have much in the way of modeling tools. It does, however, allow me to quickly assemble scenes or multiple objects and render them really fast. It will also pack and zip obj/collada/fbx and Simlab formats that you can export to share with others. It also has plugins to upload scenes to Sketchfab. You can download Setchfab as a free to use forever render solution.
Filter forge is a stand alone and plugin for photoshop that uses a node based system to make filters. I use it because it has thousands of ready made filters that can be tiled and uses as the basis for textures. You can for instance make a 1024 wood grain texture with diffuse, bump and normal map that will load right into 3d coat to modify an existing wood texture. Only ever buy this when it 70% off (Which is often).
Of course this only scratches the surface of what these programes do. I'm just a great believer in working smarter rather then harder.
Hope this is of interest.
PS Rocket 3F is a great subd modeler and its available as a free month on month app or for a very reasonable lifetime purchase.