Open Source Alternatives to Popular Software

KeePassXC

Unknown

KeePassXC is an open-source password manager that securely stores and manages sensitive information across Windows, macOS, and Linux.

Logseq

AGPL-3.0

Local-first, open-source knowledge management tool with bidirectional linking, outlines, flashcards, PDF annotations, and whiteboards for building a connected second brain.

Memos

MIT

Memos is a self-hosted, open-source note-taking app built around a private timeline. Write in Markdown, skip the folder setup, and keep your data on your own server.

Notesnook

GPL-3.0

End-to-end encrypted note-taking app with zero-knowledge architecture, cross-device sync, web clipper, and a self-hostable sync server.

Open-Notebook

MIT

Combines AI summarization, podcast generation, and multi-format content ingestion for researchers and students who want to keep their data private.

OpenNotas

Unknown

OpenNotas is a multi-platform, end-to-end encrypted note-taking app that offers simplicity, synchronization, and offline functionality.

SiYuan

AGPL-3.0

Personal knowledge management system with WYSIWYG block editing, bidirectional links, spaced repetition flashcards, a relational database, and end-to-end encrypted sync.

Standard Notes

AGPL-3.0

Cross-platform note-taking app with end-to-end encryption, offline access, and powerful organization features for privacy-conscious users.

Tolaria

AGPL-3.0

A free, open source note-taking app built on plain Markdown files, Git version control, and direct AI model integration. No account required.

Zen

AGPL-3.0

Minimal note-taking app storing Markdown notes in local SQLite database. Features instant search, flexible tagging, keyboard shortcuts, and offline access.

Bitwarden

Unknown

Bitwarden is an open source password manager that securely stores, shares, and autofills passwords across unlimited devices.

Keyshade

MPL-2.0

Secure secret management platform with public key encryption, automated rotation, versioning, and real-time collaboration tools for development teams.

Padloc

AGPL-3.0

Open-source password manager with end-to-end encryption for passwords, credit cards, notes, and documents. Cross-platform sync with secure sharing capabilities.

Passbolt

AGPL-3.0

Open source password manager focused on security, collaboration and privacy for organizations

PearPass

Apache-2.0

Open-source password manager with peer-to-peer syncing, local storage, and end-to-end encryption. No cloud servers, complete privacy control across devices.

Kap

MIT

Capture, edit, and share your screen with ease. Create stunning GIFs and videos for tutorials, demos, and bug reports.

OBS Studio

GPL-2.0

OBS Studio offers high-quality video recording and live streaming capabilities, supporting multiple platforms and providers.

Screenity

GPL-3.0

Capture, annotate, and edit screen recordings with no limits or sign-up required. Completely private and open source.

ShareX

GPL-3.0

ShareX is a free, open-source program that captures or records any area of your screen and shares it with a single keypress, supporting various file types and destinations.

Snapify

AGPL-3.0

Effortlessly create, share, and collaborate with screen recordings. Control your data with self-hosting or our secure cloud option.

LocalSend

Apache-2.0

Free, open-source file sharing tool for nearby devices. Cross-platform support with end-to-end encryption, no registration required, automatic device discovery.

OpenCloud

Apache-2.0

Self-hostable cloud file management and collaboration platform with an integrated office suite, zero-trust security, and GDPR compliance for teams and organizations.

PairDrop

GPL-3.0

Share files instantly between devices using peer-to-peer technology. No registration, installation, or configuration required. Works cross-platform.

AgentMail

Unknown

Provides AI agents with real email inboxes via REST API. Create inboxes instantly, send and receive messages, search threads, and handle attachments programmatically.