Apps with 'open source' feature Page 16 of 37

MailDotNull is a local mail catcher for development. It emulates the HTTP send APIs of popular email providers (Resend, SendGrid, Mailjet, Mailgun, Postmark, Brevo, Amazon SES) plus plain SMTP with STARTTLS and SMTPS.

JoinThis.party is a tool that can provide you with a free DNS subdomain, and several guides to help you self-host. It also provides JoinThis.proxy as an open alternative to reverse-proxy services.

ICTCore: Unified Communications Framework for web developers. Communications APIs for voice calls, SMS messaging, Fax communications and Emails.

Alphorn is an open-source, self-hostable notification service that allows you to call a webhook, and receive it on 20+ different channels.

A free and open-source Windows media library for manga, comics, books, audiobooks, movies, shows, anime, and local media.

Find cool repositories using the power of AI!.

Finds latest songs from your favourite artists. No accounts needed.

ChannelOS is a local-first television system that turns media you already own into persistent, programmable cable-style channels.

A offline and online Flutter Whiteboard with collaboration Features. Maintained in my free time. Currently demo is offline.

Free, open-source dictation app for Windows, macOS and Linux: press a hotkey, speak, and the text is pasted at your cursor in any app, transcribed offline with local Whisper or Parakeet models.

Free, open-source web & desktop vector design studio inspired by CorelDRAW with native Bézier curves, PowerTRACE™ bitmap vectorization, prepress bleed marks, and full client-side privacy.

Web based amateur radio logging application built using PHP & MySQL supports general station logging tasks from HF to Microwave with supporting applications to support CAT control.

Local-first knowledge management with Markdown notes, wiki-links, backlinks, interactive graphs, plugins, themes and SQLite or Markdown vault storage.

Clean music player with all features, updated often based on suggestions.

UDID Tools is a free, open-source web utility for retrieving the UDID of an iPhone or iPad directly in Safari.

Aura replaces the Windows file copier with a robust, high-integrity transfer engine wrapped in a polished, intuitive interface. It gives you full control over every operation—pause, resume, verify, skip errors, and resolve conflicts interactively—without compromising speed or reliability.

Open-source agentic social media scheduler for Bluesky, Threads, Instagram, LinkedIn, Mastodon, YouTube, Facebook, and more.

Capso is a free and open-source screenshot and screen recording app built natively for macOS in Swift. It offers annotation tools, scroll capture, GIF recording, OCR text recognition, and a smart OCR-powered highlighter. No Electron, no subscriptions, no watermarks.

A federated end-to-end encrypted messenger that needs no phone number or email — your account is a cryptographic key you own.

Browser-based knowledge graph editor — one graph, many focused scenes, animated transitions, AI-assisted. Local-first, no account.

Spectral is an experimental Sinclair ZX Spectrum emulator from the 80s, which has been randomly assembled since the pandemic days. Accuracy and performance are long-term goals, but the primary focus is just having fun with this thing.

An open-source, lightweight tier list creator. Craft custom rankings, use pre-made templates, and easily share your tier lists. No account needed - just create, rank, and share!.

Yet another awesome web extension for switching search engines, can also search anything (selection text / image / link / find in page) on any engine with a simple right click or a variety of menus and shortcuts. Build with React & Material-UI.

A private email address and killable aliases with no phone number or recovery email — mail lives on your device, not on the server.

A lightweight, highly customizable multi-panel file manager for Linux featuring up to 4 independent panes, desktop management, and built-in script integration.