Note-taking program supporting pen & PDF annotation

 Xournal++ is a handwritten note taking program with the target of
 flexibility, functionality and speed. The stroke recognizer and other
 parts are based on Xournal, which you can find at Sourceforge.
 It supports GNU/Linux (e.g., Ubuntu, Debian, Arch, SUSE), macOS, and
 Windows 10. Supports pen input from devices such as Wacom Tablets.
 .
 Features:
 .
  - Supports pressure senstive styluses and digital pen tables (e.g. Wacom,
    Huion, XP Pen, etc. tablets)
  - Paper backgrounds for notetaking, scratch paper, or whiteboarding
  - Annotate on top of PDFs
  - Export to a variety of formats including SVG, PNG and PDF, both from the
    GUI and command line
  - Different drawing tools (e.g.pen, highlighter) and stroke styles (e.g.
    solid, dotted)
  - Shape drawing (line, arrow, circle, rectangle, spline)
  - Fill shape functionality
  - Shape resizing and rotation
  - Rotation and grid snapping for precise alignment of objects
  - Input stabilization for smoother writing/drawing
  - Text tool for adding text in different fonts, colors and sizes
  - Enhanced support for image insertion
  - Eraser with multiple configurations
  - LaTeX support (requires a working LaTeX installation) with customizeable
    template
  - Sidebar with Page Previews with advanced page sorting, PDF Bookmarks and
    Layers (can be individually hidden/edited)
  - Allows maping different tools/colors etc. to stylus/mouse buttons
  - Customizeable toolbar with multiple configurations, e.g. to optimize
    toolbar for portrait/landscape
  - Page Template definitions
  - Bug reporting, autosave, and auto backup tools
  - Audio recording and playback alongside with handwritten notes
  - Multi language support (over 20 languages supported)
  - Plugins using Lua scripting