matplotlib
matplotlib: plotting with Python
pbek
QOwnNotes is a plain-text file notepad and todo-list manager with Markdown support and Nextcloud / ownCloud integration.
nuttyartist
Fast and beautiful note-taking app written in C++. Write down your thoughts.
jkriege2
an extensive Qt5 & Qt6 Plotter framework (including a feature-richt plotter widget, a speed-optimized, but limited variant and a LaTeX equation renderer!), written fully in C/C++ and without external dependencies
xaos-project
Real-time interactive fractal zoomer