Top 14 modem open source projects

Transmit data with sound using Web Audio -- Javascript binding for libquiet

Serverless, peer-to-peer, local file sharing through sound

Quiet for Android - TCP over sound

API server to send SMS using GSM modem. Written in Go

Audio MODEM Application for Android

Pothos demonstration applications

Source code for my c64-wifimodem

An ESP8266 based RS232 <-> WiFi modem with Hayes AT style commands and LED indicators

A NodeMCU (ESP8266) based WiFi modem for the C64's user port

Decompress code & data segment @0xD0000000 from Qualcomm modem frimware dump.

Modem implementation with WebAudio (JavaScript)

Hologram Nova Hardware

Search shodan without any knowledge about its queries

A code skeleton of Samsung's Shannon S5000 baseband modem.