WinMerge / winmerge

WinMerge is an Open Source differencing and merging tool for Windows. WinMerge can compare both folders and files, presenting differences in a visual text format that is easy to understand and handle.

NanoComp / meep

free finite-difference time-domain (FDTD) software for electromagnetic simulations

4KVCD / VideoMetricsLab

Calculate VMAF, VMAF NEG, VMAF v1, SSIMULACRA2, Butteraugli and ColorVideo VDP on NVIDIA, AMD and Intel GPUs, alongside PSNR, SSIM and XPSNR. Compare encodes with frame-exact playback that switches between the source and each encode instantly to easily spot differences.