add qoiview link to readme

README.md

@@ -18,6 +18,8 @@ cross-platform libraries for C and C++, written in C.
 
 - [Dear ImGui starterkit](https://github.com/floooh/cimgui-sokol-starterkit) a self-contained starterkit for writing Dear ImGui apps in C.
 
+- [qoiview](https://github.com/floooh/qoiview) a basic viewer for the new QOI image file format
+
 - [Tiny 8-bit emulators](https://floooh.github.io/tiny8bit/)
 
 - A 'single-file' [Pacman clone in C99](https://github.com/floooh/pacman.c/), also available in [Zig](https://github.com/floooh/pacman.zig/)