xournal - Lightweight notetaking and sketching app.
glogg - glogg is a multi-platform GUI application to browse and search through long or complex log files.
Xournal++ - Xournal++ is a handwriting notetaking software with PDF annotation support. Written in C++ with GTK3, supporting Linux (e.g. Ubuntu, Debian, Arch, SUSE), macOS and Windows 10. Supports pen input fr...
klogg - klogg is the fork of glogg - the fast, smart log explorer.
Stylus Labs Write - Write is a word processor for handwriting, designed primarily for tablets with an active stylus.
SPHW - LogViewer - A free platform-independent tool for monitoring log files in real-time.