EnginPlot, a tiny viewer for enormous engineering datasets

Why it surfaced

EnginPlot promises smooth interaction with up to 150 million plotted points in a self-contained executable under 1.2 MB—no installer, dependencies, or companion DLLs. Its unusually detailed feature set includes data-quality flags, automatic dual axes, channel thumbnails, and configurable CSD phase wrapping.

A free Windows app that plots RPC3, PLT, fstrm, and CSV time-history files, including frequency, histogram, and cross-spectral-density views.