If you’ve ever looked up at the night sky and wondered “What star is that?”, Stellarium answers it beautifully.

🪐 Realistic sky rendering
🔭 Telescope control support
🌙 Perfect for the curious, casual stargazers and serious astronomy nerds
💻 Runs on desktop, mobile, and even in the browser

It’s clean, powerful, and completely free

Flying Carpet is an open‑source project that makes file transfer across devices simple and secure. Think of it as a cross‑platform alternative to AirDrop: no central server, no complicated setup, just two devices in close range using WiFi (and optionally Bluetooth). It’s designed to work seamlessly across Android, iOS, Linux, macOS, and Windows.

Key Features

📱 Cross‑platform support – Works on Android, iOS, Linux, macOS, and Windows.

📡 Ad hoc WiFi transfers – No network infrastructure required; devices connect directly.

🔒 Optional Bluetooth negotiation – Adds flexibility for initiating transfers.

⚡ Fast & lightweight – Simple interface, efficient transfer speeds.

🛠️ Open source – Built in Rust and Kotlin, available on GitHub for contributions.

🎥 Demo video & installers – Easy to get started with prebuilt binaries and clear documentation.

Quick links to app stores are on the github page. For Windows, Linux and MacOS look under "Releases" under the "About" section.

Wealthfolio is a beautiful, open-source portfolio tracker that runs locally on your devices. It helps you monitor all your accounts in one place, analyze performance, track dividends and fees, and set financial goals — all while keeping your data private and under your control.

⭐ Features

🔒 Privacy-first — Runs locally, keeping your financial data secure and offline.

📂 Account aggregation — Import CSV statements and view all accounts together.

📊 Analytics — Track asset allocation, fees, dividends, and interest earnings.

📈 Performance insights — Compare accounts against indexes and ETFs, view past trends.

🎯 Goal tracking — Define financial goals and monitor progress visually.

📅 Trading tracker — Simple swing stock trading with calendar views and performance analytics.

🛠️ Open-source — Transparent, community-driven development.

End-to-End Encrypted Location Sharing without big corp collecting, storing and profiting your data.

Description:

🔑 End-to-End Encryption (E2EE): Your GPS data is encrypted before leaving your phone. Not even Grid can see it.

🗺️ Private Maps: Uses open-source Protomaps instead of Google/Apple, eliminating third-party tracking.

⚙️ Full Control: Expiring shares, instant revocation, unlimited groups — your rules, no paywalls.

🛡️ Zero Data Exploitation: No ads, no trackers, no data sales.

🌍 Open Source: Built on the Matrix protocol, independently audited by NCC Group, Least Authority, and German BSI.

📱 Cross-Platform: Available on iOS & Android, with self-hosting options for maximum control.

👥 Use Cases: Family check-ins, hiking, cycling, moto clubs, travel coordination, and field work teams.

Why it matters:

Grid stands out in the location-sharing space by prioritizing privacy, transparency, and user empowerment. Unlike mainstream apps that monetize your movements, Grid ensures your data stays yours. Perfect for anyone who values security while staying connected.

Habitica is a free habit‑building and productivity app that turns your real life into a role‑playing game. By completing tasks, you earn rewards, level up your avatar, and collaborate with friends to stay motivated.

✅ Track habits, daily goals, and to‑do lists with ease

🎁 Earn rewards, unlock pets, skills, and quests as you progress

⚔️ Battle monsters with friends and join parties for accountability

🖥️ Cross‑platform support with web and mobile apps (iOS, Android)

🔧 Fully customizable task lists to fit personal goals and projects

💪 Improve health, fitness, school, and work productivity through gamification

🤝 Open‑source project supported by a strong community

Perfect for: Anyone who wants to stay motivated by turning productivity into a fun, game‑like experience.

Destiny is an open-source secure file transfer application built on the Magic Wormhole protocol. It allows users to send files in real time without revealing identities or storing data on servers. Key features:

🔒 End‑to‑end encryption for safe delivery

🌐 Peer‑to‑peer connections with no central storage

🧩 Short, human‑memorable codes for quick and secure transfers

🛡️ Designed with human rights organizations in mind

✅ Independently audited for security assurance

💻 Cross‑platform support: Android, iOS, Windows, macOS, Linux

Perfect for anyone who needs fast, private, and trustworthy file sharing without compromising on security.

Rabby is a modern browser and mobile wallet built for Ethereum and all EVM chains, designed to simplify daily Web3 interactions with a focus on security and usability. Key features:

🧮 Transaction simulation shows what will happen before you sign

⛽ Gas account management to streamline payments across chains

🧹 Batch revoke tools to tidy old approvals

🔒 Hardware wallet support for stronger key security

🧩 Clean, user-friendly interface preferred by many over legacy wallets

✅ Open-source, third-party audited, and transparency-focused

📱 Available as a browser extension and mobile app

Perfect for users who want a faster, safer, and more convenient way to interact with dApps across multiple EVM networks.

Honeygain is a free friendly app that lets you earn money by sharing unused internet bandwidth. It connects your device to the Honeygain network, helping businesses access web intelligence while you get paid. Key features:

🌐 Runs on Windows, macOS, Linux, Android, and iOS

💰 Earn credits for every MB of traffic shared, cash out via PayPal or crypto

🔒 Secure: no access to personal files or data, only bandwidth is used

⚙️ Simple setup: install, sign in, and start earning instantly

🎁 Referral program to boost earnings with friends

🚀 Passive income stream with minimal effort

Perfect for anyone who wants to monetize their idle internet connection and turn spare bandwidth into extra cash.

SimpleX Chat is a free, open-source messenger designed for maximum privacy. Unlike other messaging networks, SimpleX has no identifiers assigned to users — not even random ones. Key features:

🔒 End-to-end encryption with no usernames, phone numbers, or public keys

📱 Private connections via link or QR code for messaging and calls

🌐 Pairwise anonymous addresses hide communication metadata from servers and observers

🛡️ Option to connect via Tor for extra anonymity

💻 Cross-platform support: Android, iOS, and desktop

🌍 Community-driven, open-source transparency

Perfect for anyone who wants truly private communication without digital footprints.

LocalSend is a free, open‑source, cross‑platform tool that lets you share files instantly with nearby devices — no internet required.

📡 Send files directly over local network

🔒 Secure, private, and open‑source

💻 Works across Windows, macOS, Linux, Android, and iOS

⚡ Fast transfers without cloud dependency

Perfect for: Users who want a simple, private, and cross‑platform way to share files without third‑party servers.

Calibre is a powerful and easy‑to‑use e‑book manager that goes beyond normal e‑book software. It’s completely free and open source, making it a must‑have for both casual readers and power users.

⏱️ Save time on managing your e‑book collection

🌍 Use it everywhere and with anything

📖 Comprehensive e‑book viewer

📰 Download news and magazines from the web

📤 Share and back up your library easily

✏️ Edit the books in your collection

🛠️ Satisfy every e‑book need with community support

Perfect for: Readers and professionals who want a versatile, free, and open‑source solution for managing their digital libraries.

Jami is a free/libre, end‑to‑end encrypted, and private communication software. It offers peer‑to‑peer connectivity without central servers, ensuring privacy and freedom for its users.

⚡ Fast latency with direct peer‑to‑peer connections

🌐 Works even without internet on local networks

🛡️ End‑to‑end encrypted communications

🙅 No personal information required to create an account

📞 Unlimited: no restrictions on file size, bandwidth, or features

🚫 Ad‑free: there will never be advertising on Jami

Perfect for: Users who want secure, private, and unrestricted communication across multiple platforms.

Obsidian is a powerful note‑taking and knowledge management app that adapts to the way you think. It uses Markdown files stored locally, giving you full control over your data while offering extensive customization through plugins and themes.

📂 Local‑first: your notes are plain Markdown files

🔒 Privacy‑friendly, no forced cloud dependency

🧩 Hundreds of plugins and themes for customization

⚡ Fast, flexible, and extensible knowledge base

🌐 Cross‑platform support (Windows, macOS, Linux, Android, iOS)

🤝 Free for personal use, with optional paid sync and publishing features

Perfect for: Writers, researchers, and thinkers who want a private, customizable, and extensible knowledge management system.

Orbot is a free, open-source app that routes your mobile traffic through the Tor network, giving you strong privacy and censorship resistance. Key features:

🔒 Encrypts traffic from any app, preventing snooping and blocking

🛡️ No central logging of your IP or history — full anonymity

📱 App-by-app routing on Android, so you choose which apps use Tor

🧅 Access onion services directly from your phone, or even host your own

🌉 Built-in Tor Bridges to stay connected on restricted networks

🚀 Fast, secure access to popular onion services

👨‍💻 Developed by Guardian Project, fully open-source and community-audited

Perfect for privacy-conscious users who want secure, censorship-resistant access on mobile devices.

Arc is a modern web browser developed by The Browser Company, designed to reimagine how we use the internet. It emphasizes simplicity, personalization, and privacy, offering a fresh alternative to traditional browsers.

✨ Clean, clutter‑free interface with Spaces & Profiles for organization

🔒 Privacy‑focused: no tracking of sites visited or search queries

🖼️ Easel feature for scrapbook‑style content organization

🎨 Boosts to cosmetically redesign websites, similar to extensions

🔍 Spotlight‑like search for quick navigation

📂 Dock for frequent websites & split‑screen mode for multitasking

💻 Available on macOS, iOS, and Windows

🤝 Community‑driven with a focus on user experience and calm browsing

Perfect for: Users who want a browser that adapts to their habits, reduces clutter, and prioritizes privacy.

Kodi is an open‑source home theater software that brings your media to life with a beautiful interface and a wide range of features. It supports movies, TV shows, music, photos, and even live TV, all in one place.

🎥 Play videos, music, podcasts, and digital media from local storage, network shares, or the internet

🎨 Customize with skins and thousands of community add‑ons

📻 Stream internet radio and manage playlists

📂 Organize movies, TV shows, and music with artwork, cast info, and genres

📺 Watch and record live TV with PVR support (MediaPortal, MythTV, Tvheadend, etc.)

🎮 Play retro games via emulators and controller support

🖥️ Runs on Windows, Linux, Android, Raspberry Pi, macOS, iOS, and more

🤝 Community‑driven, open‑source project with active development

Perfect for: Users who want a flexible, customizable, and powerful home theater solution.

Cryptomator is a simple tool for digital self‑defense. It allows you to protect your cloud data independently, ensuring only you hold the keys to your files.

🔑 Client‑side encryption – you control the keys, not the cloud provider

📂 Create secure vaults for files and folders in cloud storage

🖥️ Cross‑platform support (Windows, macOS, Linux, Android, iOS)

⚡ Easy to use, integrates seamlessly with cloud services like Dropbox, Google Drive, OneDrive, and more

🔒 Transparent encryption – works like a virtual drive for secure access

🤝 Open‑source project trusted by privacy and security communities

Perfect for: Users who want to secure their cloud data without relying on providers’ encryption.

ZeroTier is a secure network overlay that allows you to manage all of your network resources as if they were on the same LAN. It’s a software‑defined solution that empowers teams to create global private networks connecting devices directly, no matter where they are.

⚡ Deploy in minutes from anywhere – simple setup and management

🔒 End‑to‑end encrypted connections for secure communication

📂 Manage devices as if they’re on the same local network

🖥️ Cross‑platform support (Windows, macOS, Linux, iOS, Android, Synology, Docker, FreeBSD, QNAP, WD‑MyCloud)

🔧 Flexible integration with existing infrastructure and cloud services

🌐 Freemium model – free for personal use, scalable for enterprise needs

🤝 Community‑driven, open‑source project with active development

Perfect for: Users and organizations who want secure, flexible, and easy‑to‑manage networking across devices and locations.