Top 6 airgap Open-Source Projects

system-bus-radio

19 6,138 4.2 C

Transmits AM radio on computers without radio transmitting hardware.

Project mention: Web FM synthesizer made with HTML5 | news.ycombinator.com | 2023-10-29

As opposed to AM: https://fulldecent.github.io/system-bus-radio/

org.quietmodem.Quiet

1 1,427 1.8 C

Quiet for Android - TCP over sound
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zarf

6 1,027 9.5 Go

DevSecOps for Air Gap & Limited-Connection Systems. https://zarf.dev/

Project mention: Zarf: K8s in Airgapped Environments | news.ycombinator.com | 2024-01-11

amodem

6 918 4.6 Python

Audio MODEM Communication Library in Python

Project mention: Replacement PCB Replicates Early 80s Modem | news.ycombinator.com | 2024-02-22

This will get you started:
Tony Fisher wrote V.32 soft modem stack for SGI Indy back in 1996. York University couldnt handle hosting whole 8 megabytes of his stuff https://www.cs.york.ac.uk/news/fisher/home-page but at least they had the decency to upload it to github instead of just deleting https://github.com/university-of-york/cs-www-users-fisher/tr... Randy Rossi rewrote this project and got working V.21/23 https://github.com/randyrossi/fisher-modem
Fabrice Bellard, because of course he did :), implemented his own version all the way to V.34 with parts of V.90 https://bellard.org/linmodem/
V.21 modem implemented in Gnu Radio https://web.archive.org/web/20170627151353/http://aaronscher...
amodem - good source of ready made modulation implementations https://github.com/romanz/amodem
minimodem- simple radio link FSK modem https://github.com/kamalmostafa/minimodem
audsl - leased line project, not compatible with standard modems https://www.araneus.fi/audsl/ but might give some ideas.

airgap-wallet

7 426 7.8 TypeScript

The AirGap Wallet is installed on an everyday smartphone. This app has only access to public information.
hauler

1 84 8.7 Go

Airgap Swiss Army Knife

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2024-02-22.