BuySoftwaresOnlineXournal++
Handwrite and annotate PDFs with a stylus
PDF & Note-TakingGPL-2.0+Windows · macOS · Linux
About Xournal++
Xournal++ combines PDF annotation, handwriting with pressure support, LaTeX formulas and audio notes — a free OneNote-meets-acrobat for tablet and stylus users.
Xournal++ is completely free and open source (GPL-2.0+) — no trials, no subscriptions, no locked features. Always download from the official website to avoid bundled malware.
Free alternative to: Paid annotation apps
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