3DS MAX
Autodesk 3ds Max, formerly 3D Studio Max, is a 3d development suite for making 3D animations, models, and images. It has modeling capabilities, a flexible It is frequently used by video game developers, TV commercial studios and architectural visualization studios. It is also used for movie effects and movie pre-visualization. In addition to its modeling and animation tools, the latest version of 3ds Max also features shaders (such as ambient occlusion and subsurface scattering), dynamic simulation, particle systems, radiosity, normal map creation and rendering, global illumination, a customizable user interface, and its own scripting language.
http://en.wikipedia.org/wiki/Autodesk_3ds_Max
MAYA
Autodesk Maya, commonly shortened to Maya, is 3D computer graphics software that runs on Microsoft Windows, Mac OS and Linux, currently owned and developed by Autodesk, Inc. It is used to create interactive 3D applications, including video games, animated film, TV series, or visual effects. The product is named after the Sanskrit word Maya, the Hindu concept of illusion.
Maya 1.0 was released in February 1998. Following a series of acquisitions, Maya was bought by Autodesk in 2005. Under the name of the new parent company, Maya was renamed Autodesk Maya. However, the name "Maya" continues to be the dominant name used for the product.
Lightwave
LightWave is a software package used for rendering 3D images, both animated and static. It includes a rendering engine that supports such advanced features as realistic reflection and refraction, radiosity, and caustics. The 3D modeling component supports both polygon modeling and subdivision surfaces. The animation component has features such as reverse and forward kinematics for character animation, particle systems and dynamics. Programmers can expand LightWave's capabilities using an included SDK which offers LScript scripting (a proprietary scripting language) and common C language interfaces.
http://en.wikipedia.org/wiki/LightWave_3D
Blender
Blender is a free and open-source 3D computer graphics software product used for creating animated films, visual effects, interactive 3D applications or video games. Blender's features include 3D modeling, UV unwrapping, texturing, rigging and skinning, fluid and smoke simulation, particle simulation, animating, match moving, camera tracking, rendering, video editing and compositing. It also features a built-in game engine.
Cinema 4D
CINEMA 4D is a 3D modeling, animation and rendering application developed by MAXON Computer GmbH of Friedrichsdorf, Germany. It is capable of procedural and polygonal/subd modeling, animating, lighting, texturing, rendering, and common features found in 3d modelling applications.
http://en.wikipedia.org/wiki/Cinema_4D
ZBrush
ZBrush is a digital sculpting tool that combines 3D/2.5D modeling, texturing and painting. It uses a proprietary "pixol" technology which stores lighting, colour, material, and depth information for all objects on the screen. The main difference between ZBrush and more traditional modelling packages is that it is more akin to sculpting.
ZBrush is used as a digital sculpting tool to create high-resolution models (up to ten million polygons) for use in movies, games, and animations. It is used by companies ranging from ILM to Electronic Arts. ZBrush uses dynamic levels of resolution to allow sculptors to make global or local changes to their models. ZBrush is most known for being able to sculpt medium to high frequency details that were traditionally painted in bump maps. The resulting mesh details can then be exported as normal maps to be used on a low poly version of that same model. They can also be exported as a displacement map, although in that case the lower poly version generally requires more resolution. Or, once completed, the 3D model can be projected to the background, becoming a 2.5D image (upon which further effects can be applied). Work can then begin on another 3D model which can be used in the same scene. This feature lets users work with extremely complicated scenes without heavy processor overhead.
Personally, I have only used 3D studio Max, Light wave and Blender, I find 3Ds max easiest to use, and now that’s just me while others prefer to use blender and such others. Each of the software however has its given audience, Google’s ‘Sketch up’ is used by Architects, Maya is mainly used for 3D effects in TV and films, and 3DS max is used for modeling objects for games. Even though there are many of them, they all achieve the same result, which is to create 3D polygon objects. The only thing different between each software is the Use interface and some of the behind-the-scene stuff like how they render.
File Formats
A proprietary format is a file format where the mode of presentation of its data is the intellectual property of an individual or organisation which asserts ownership over the format. In contrast, a free format is a format that is either not recognised as intellectual property, or has had all claimants to its intellectual property release claims of ownership. Proprietary formats can be either open if they are published, or closed, if they are considered trade secrets. In contrast, a free format is never closed.
Proprietary formats are typically controlled by a private person or organization for the benefit of its applications, protected with patents or as trade secrets, and intended to give the license holder exclusive control of the technology to the (current or future) exclusion of others.
Examples of proprietary formats, AutoCAD - .dxf, 3D Studio Max - .3ds, Maya - .mb, LightWave - .lwo
Examples of open formats, .obj and .dae. 
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