ImageJ is a public domain, Java-based image processing program developed at the National Institutes of Health. ImageJ was designed with an open architecture that provides extensibility via Java plugins and recordable macros.

Paraview is described as 'ParaView is an open-source, multi-platform application designed to visualize data sets of size varying from small to very large' and is an app in the education & reference category. There are eight alternatives to Paraview for Windows, Linux, Mac and Web-based. The best Paraview alternative is ImageJ, which is both free and Open Source. Other great apps like Paraview are F3D, GGobi, VisIt and Vega Voyager.
ImageJ is a public domain, Java-based image processing program developed at the National Institutes of Health. ImageJ was designed with an open architecture that provides extensibility via Java plugins and recordable macros.

F3D (pronounced /f?d/) is a fast and minimalist 3D viewer desktop application. It supports many file formats, from digital content to scientific datasets (including glTF, USD, STL, STEP, PLY, OBJ, FBX, Alembic), can show animations and support thumbnails and many rendering and...




GGobi is an open source visualization program for exploring high-dimensional data. It provides highly dynamic and interactive graphics such as tours, as well as familiar graphics such as the scatterplot, barchart and parallel coordinates plots.

VisIt is an Open Source, interactive, scalable, visualization, animation and analysis tool. From Unix, Windows or Mac workstations, users can interactively visualize and analyze data ranging in scale from small (<10^1 core) desktop-sized projects to large (>10^5 core)...
"Voyager 2 is a data exploration tool that blends manual and automated chart specification."
GiD is a universal, adaptive and user-friendly pre and postprocessor for numerical simulations in science and engineering. It has been designed to cover all the common needs in the numerical simulations field from pre to post-processing: geometrical modeling, effective...

