Best open source tools

Tezos mobile accounts and a multichain browser wallet

A free Markdown writing workspace with live preview, local files, and exports.

A lightweight local Markdown knowledge base with tags, search, and a note graph.

Local Markdown notebooks with backlinks, search, and optional self-hosted encrypted sync.

An open-source time tracker with projects, clients, invoicing, reports, and a hosted option.

Track investment transactions in a self-hosted portfolio application

Coordinate SaaS plans, usage meters and payment gateways

An open-source notebook for multimedia notes, attachments, and personal reference material.

Bitcoin signing firmware for supported K210 devices

Android Monero wallet with node selection and discreet display

Self-host an XMPP server for instant messaging and group chat.

Monero community wallet with simple and advanced node modes

Multiple wallets with market research and recovery controls

Free Bitcoin and Liquid explorer with detailed transaction and output views

Keep channels, DMs, and federated conversations in a compact self-hosted server.

An open-source collaborative Markdown editor for notes, diagrams, and presentations.

Turn a concise text description into a customizable diagram with the D2 language.

Group, route, silence, and inhibit alerts before they reach your notification channels.

An open-source classroom whiteboard with shared rooms and private student canvases.

A free, open-source time tracker for self-hosted projects, tasks, and billable hours.

Plan client projects with tasks, timelines, budgets, resource scheduling, time tracking, and a client portal.

Keep project tracking focused with boards, backlog planning, Gantt charts, and GitHub integration.

Connect goals, milestones, and project tasks in an open-source work management tool.

Plan agile work with Scrum and Kanban boards in an open-source, self-hosted tool.