FOSS apps: free and open source

Free and open-source software: the source code is public under an open licence.

page 97

Echoes

Offline-first, end-to-end encrypted notes — synced privately over Nostr, on your terms.
- Security & privacy
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
eikon

A local-first, privacy-first photo and video gallery for Android, built natively with Kotlin and Jetpack Compose and inspired by the…
- Multimedia
- FOSS
- Free
- Android only
Zapstore GitHub
El Boton
- System & tools
- FOSS
- Free
- Android only
Zapstore GitHub
ElCaju

Private Cashu ecash wallet with Lightning support
- Finance
- FOSS
- Free
- Android only
Zapstore GitHub
eNuts

Private ecash payments with Cashu and Lightning
- Finance
- FOSS
- Free
- Android only
Zapstore
ERV

Local-first Android health tracker with optional encrypted Nostr sync.
- Health & fitness
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Espy

See beauty, share color
- System & tools
- FOSS
- Free
- Nostr
- Android only
Zapstore
Fedimint

A federated ecash mint on your phone with QR-based setup, guardian management, and easy backups.
- Finance
- FOSS
- Free
- Android only
Zapstore GitHub
File transfer

Zero SPOF file transfer over Nostr. End-to-end encrypted, decentralized, and private.
- Security & privacy
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
fips2go

Reach the FIPS mesh from your phone, on the apps you choose
- Communication
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Firedown

Privacy-respecting browser and downloader for Android
- Internet
- FOSS
- Free
- Android only
Zapstore GitHub
FishyFishy

A little journal for big underwater discoveries
- Education
- FOSS
- Free
- Android only
Zapstore GitHub
Flotilla

Self-hosted community chat and threads built on the nostr protocol.
- Communication
- FOSS
- Free
- Nostr
- Android only
Zapstore Google Play Aurora Store
FlowLINE

Client de contrôle à distance FlowLINE
- Productivity
- FOSS
- Free
- Android only
Zapstore
Fortis Wallet

Non-custodial wallet for Bitcoin XBT and Bitcoin BTC
- Finance
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Freeflow

Live in the moment
- Multimedia
- FOSS
- Free
- Android only
Zapstore Google Play Aurora Store GitHub
FujiNet Go 800

FujiNet Go 800 brings the classic Atari 8-bit computing experience to Android with built-in FujiNet support
- Games
- FOSS
- Free
- Android only
Zapstore Google Play Aurora Store GitHub
GeoSwarm Lite

GeoSwarm Lite is an offline-first, peer-to-peer surveying app for Android.
- System & tools
- FOSS
- Free
- Android only
Zapstore GitHub
gittr

Decentralized and discoverable Nostr gits, apps and pages
- Finance
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
GitWorkshop

Git collaboration, without the platform.
- System & tools
- FOSS
- Free
- Nostr
- Android only
Zapstore
Glance

A privacy-first, watch-only Bitcoin wallet for Android.
- Finance
- FOSS
- Free
- Android only
Zapstore GitHub
Greet & Grow

A powerful, offline personal CRM app built with Flutter, with custom features for fundraising, ministry, sales, and personal use.
- System & tools
- FOSS
- Free
- Android only
Zapstore
Hakari

Privacy-first weight & body composition logger with encrypted Nostr backup
- Health & fitness
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Hanami

Companion app for the Hanami Blossom server
- System & tools
- FOSS
- Free
- Android only
Zapstore GitHub
Haven

Private and censorship-resistant location sharing.
- Security & privacy
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Hessible

A privacy-first Android contacts app. Your contacts are encrypted end-to-end and stored on Nostr relays — readable only with your key,…
- Security & privacy
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Hisa

Nostr marketplace for products and services
- System & tools
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Holy Fit

Track your daily physical activity (steps) and sync to Nostr.
- Security & privacy
- FOSS
- Free
- Nostr
- Android only
Zapstore
Honeypot

A freedom wallet for the relays
- Finance
- FOSS
- Free
- Android only
Zapstore GitHub
Horcrux

Horcrux is an app for backup and recovery of sensitive data like digital wills, passwords, and cryptographic keys.
- System & tools
- FOSS
- Free
- Android only
Zapstore Google Play Aurora Store GitHub
IndieSats

Discover indie music, support artists with Lightning
- Multimedia
- FOSS
- Free
- Nostr
- Android only
Zapstore
Infans

A privacy-first baby tracking app with Nostr-based encrypted storage and parent-to-parent sync.
- Security & privacy
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Iris Chat

End-to-end encrypted chat app using Nostr Double Ratchet.
- Communication
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Iris Drive

Private peer-aware file sync over local htree storage.
- Security & privacy
- FOSS
- Free
- Nostr
- Android only
Zapstore
Kairos

Offline-first, end-to-end encrypted tasks — synced privately over Nostr, on your terms.
- Security & privacy
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Kashir

Kashir is a mobile ecash(Cashu) wallet
- Finance
- FOSS
- Free
- Android only
Zapstore Google Play Aurora Store GitHub
Keep

Keep is a FROST threshold signing app and dedicated Nostr event signer for Android.
- Security & privacy
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Keychat

Keychat is the super app for Bitcoiners. Autonomous IDs, Bitcoin ecash wallet, secure chat, and rich mini apps — all in Keychat. Autonomy.
- Finance
- FOSS
- Free
- Android only
Zapstore Google Play Aurora Store GitHub
Kilowallet

Bitcoin BLAKE2b wallet: hot + watch-only, coinjoin, Ark and Lightning, full backup
- Finance
- FOSS
- Free
- Android only
Zapstore GitHub
KindBeamer

KindBeamer sends your documents to your Kindle devices.
- Productivity
- FOSS
- Free
- Android only
Zapstore GitHub
KithMoot

Chat, calls, files and AI agents for your group, encrypted end to end
- Communication
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Kubo

A YouTube Kids alternative built around trust, not algorithms.
- Communication
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
LaChispa

A mobile interface to easily connect with any LNbits instance
- Finance
- FOSS
- Free
- Android only
Zapstore GitHub
LaWallet Card Manager

Generate URL and QR for LaWallet NFC Cards.
- System & tools
- FOSS
- Free
- Android only
Zapstore GitHub
LaWallet POS

Lightning + Nostr point-of-sale for Android
- Finance
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
LCe

A powerful and easy-to-use video compression app for android that uses the native MediaCodec API.
- Multimedia
- FOSS
- Free
- Android only
Zapstore Google Play Aurora Store
LiberBit World

Plataforma descentralizada de gobernanza y comunidad para ciudades privadas soberanas.
- System & tools
- FOSS
- Free
- Android only
Zapstore GitHub
LiberMedia

Cliente Nostr descentralizado — rede social, Lightning e muito mais
- Communication
- FOSS
- Free
- Nostr
- Android only
Zapstore Google Play Aurora Store GitHub