Applications and Libraries
Applications
D2V Witch – creates indexes that can be opened by d2vsource
mpv.net – a media player with VapourSynth built-in
SmoothVideo Project – a plugin/video player component for realtime frame interpolation
StaxRip – encoding GUI with extended VapourSynth scripting support
VapourSynth Editor (Doom9) – an editor with syntax completion and fast preview support
VapourSynth Editor 2 (Doom9) – a spiritual successor to VapourSynth Editor
VirtualDub2 (Doom9) – VirtualDub with added support for high bitdepth colorspaces, useful for previewing
vspreview – an advanced standalone previewer written in python with too many features to list
vspreview-rs (Doom9) – minimal VapourSynth script previewer
Wobbly – IVTC assistant similar to YATTA
Libraries
VapourSynth.nim – Bindings for the Nim programming language
vapoursynth-rs – VapourSynth Rust wrapper
vsxx – VapourSynth C++ API wrapper