Discord
Discord Inc. · Collaboration & communication
Community chat platform with servers, text and voice channels, video, forums and a bot API, free to use with optional Nitro subscriptions
ProprietaryFreemiumPaidNov 2, 2026
Directory
6 tools
Results
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
Obsidian
Dynalist Inc. (Obsidian) · Personal knowledge management
Local-first Markdown note-taking app with bidirectional links, graph view and a large community plugin ecosystem; optional paid Sync and Publish
ProprietaryFreePaidLocalBroken
Slack
Slack Technologies (Salesforce) · Collaboration & communication
Channel-based team messaging platform from Salesforce with threads, huddles, canvases, workflow automation and an extensive bot and app API
ProprietaryFreemiumPaidNov 2, 2026
Todoist
Doist Inc. · Productivity suites & task management
Cross-platform task manager from Doist with natural-language scheduling, projects, labels, filters, shared projects and a public REST API
ProprietaryFreemiumPaidNov 2, 2026
Zoom
Zoom Communications, Inc. · Collaboration & communication
Video meetings and webinar platform, now packaged as Zoom Workplace with team chat, phone, whiteboard, AI Companion and developer APIs and SDKs
ProprietaryFreemiumPaidNov 2, 2026
Page 1 of 1
Share this view: /tools?category=productivity&os=linux&exec=cloud