Logseq
Logseq · Personal knowledge management
Open-source, outliner-based knowledge base storing notes as local Markdown or Org-mode files with block references, queries and a graph view
AGPL-3.0-onlyOpen sourceFreeLocalNov 2, 2026
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Moodle
Moodle Pty Ltd (Moodle HQ) · Collaboration & communication
Open-source learning management system used by universities and schools for courses, assignments, quizzes, grading and forums, self-hosted or via MoodleCloud
GPL-3.0-or-laterOpen sourceFreeSelf-hostedBroken
WireGuard
WireGuard project (Jason A. Donenfeld) · Tunneling & remote access
Minimal, high-speed VPN protocol and implementation built on modern cryptography, included in the Linux kernel and available on macOS, iOS, Windows, Android and BSD
GPL-2.0-onlyOpen sourceFreeLocalSelf-hostedNov 2, 2026
Zotero
Corporation for Digital Scholarship · Citation management
Free, open-source reference manager with browser connectors, word-processor plugins, a PDF reader, group libraries and optional paid file storage
AGPL-3.0-onlyFreeOpen sourceLocalNov 2, 2026
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