Apple Motion!

With Adobe After Effects software, you can create compelling motion graphics and blockbuster visual effects with flexible tools that help save you time and deliver unparalleled creative power. It's used in the post-production process of filmmaking and television production and its main uses are the origination of 2D and 2.5D animation, visual effects compositing and finishing (image adjustment, color correction etc.). After Effects can also be used as a basic non-linear editor and a media transcoder. »

Natron is an open source, cross platform nodal compositing application. It is built around industry standard open source tech such as OpenFX, OpenEXR, OpenColorIO and OpenImageIO. The feature set includes realtime playback/RAM cache, multi-threaded rendering, 2d tracking, rotoscoping, grading, animation via f-curves and 3rd party OpenFX plugin support. All contained within a familiar, intuitive interface with an XML based project file format.

HitFilm merges FXHome VisionLab Studio , FXHome Effectslab and FXHome CompositeLab into one software.

Wax is a high performance and flexible video compositing and special effects software. The idea for Wax is to be very general purpose and flexible in video compositing and effects, so that you can compose your dream video sequence with ease every time.

Blackmagic Fusion (formerly known as Fusion and eyeon Fusion) is an image compositing software program created by eyeon Software Inc, now developed by Blackmagic Design. It is typically used to create visual effects and digital compositing for movies, TV-series and commercials. It employs a node-based interface in which complex processes are built up by connecting a flowchart or schematic of many nodes, each of which represents a simpler process, such as a blur or color correction. This type of compositing interface allows great flexibility, including the ability to modify the parameters of an earlier image processing step "in context" (while viewing the final composite). Upon its acquisition by Blackmagic Design, Fusion was released in two versions: the freeware Fusion, and the commercially sold Fusion Studio. »

ButtleOFX is a simple, user-friendly and open source compositing software. It is based on TuttleOFX,  an open source, modular and sustainable image processing architecture.

Liconcomp allows live content compositing to display screens for digital signage, scoreboards, LED installations, ....

3D Model Maker lets you create virtual 3D models in your computer. You can create anything your imagination can think of. (Not limited to simple cubes or blocks like some apps!) It uses meshes of polygons just like they used in Toy Story.It uses the 3DS file format which is compatible with lots of professional software like Autodesk 3D Studio, Maya, AutoCAD and Blender. This means you can create your models on the move on your tablet or PC and import them later into the 3D package of your choice.Use tools like "extrude", "subdivide", "smooth", "pull" and many more to create your 3D objects. Move the individual vertices around or move select multiple vertices with the box select tool.Paint the faces different colors. Rotate the 3D shapes at any angle or choose from a list of views. »

BluffTitler is a Windows desktop app for creating, rendering and playing 3D video effects.

particleIllusion 3.0: award-winning standalone particle effects application that enables you to quickly and easily add a huge variety of particle effects to your images, animation, or video.

Autodesk® Smoke® software is a leader in editorial finishing for high-quality commercial and broadcast projects. Smoke offers an end-to-end finishing toolset that combines intuitive timeline navigation with advanced 3D finishing tools. Native support for industry-standard media formats and GPU-accelerated interactivity when compositing means you can finish projects faster and deliver your best work even against tight deadlines.

PixelConduit Complete is an add-on pack of PixelConduit(free) that provides even more functionality for advanced tasks. If you need to automate live video or post-production workflows, record video streams to disk, or create complex live shows, then PixelConduit Complete is the solution.