P2P Voice/Video phone App for local networks.

A hands-free mini walkie-talkie powered by embedded AI, featuring automatic voice detection, keyword-triggered animations, and real-time speech-to-text display.

Turn your Android phone into Amateur Radio Codec2/OPUS APRS enabled DV handheld transceiver (Bluetooth/BLE/USB/TCPIP KISS/Sound modem client for DV digital voice communication)

The source code and dataset are used to demonstrate the DF model, and reproduce the results of the ACM CCS2018 paper

Enterprise push-to-talk (PTT) for security, logistics, field ops & emergency services. Android + Web dashboard, real-time GPS & SOS, hardware PTT button support ▎ (F22/F22+/F25), Docker-isolated private servers. Hosted from €165/mo or one-time €2,800 self-hosted license with full source.

An Android app to enable infrastructure-less communication using WIFI-Direct.

ESP32 based Codec2/OPUS DV hobby UHF 3d printed handheld transceiver aka walkie-talkie

森海克斯8800(pro)/8600(pro)/GT12跨平台写频软件，支持蓝牙写频(8800)、更方便的信道修改以及其他实用小工具

Walki Talkie QuanSheng UV-K5/K6/UV-5R Plus Custom Firmware Merge from: ▪ @OneOfEleven and ▪ @fagci Mod w. Spectrum Analyzer ▪ by @egzumer ▪ Enhanced by @RE3CON: Full freq range of BK4819 for TX and RX: 14MHz ~ 665MHz and 745MHz ~ 1899MHz. 2nd ToneBurst 1050Hz and 1750Hz = PTT + Sidekey 1, PTT + Sidekey 2. Build with CGI 11.3.Rel1 saves some space

A bluetooth based push to talk app for Android.

VoicePing Android SDK - Walkie Talkie/Push-To-Talk Android SDK for your Chat Apps

Walkie-talkie for WiFi. PTT app for local network.

A real-time, offline voice assistant for Linux and Raspberry Pi. Uses local LLMs (via Ollama), speech-to-text (Vosk), and text-to-speech (Piper) for fast, wake-free voice interaction. No cloud. No APIs. Just Python, a mic, and your voice.

QuanSheng UV-K5/K6/UV-5R Plus Custom Firmware Merge from: ▪ @OneOfEleven and ▪ @fagci Mod w. Spectrum Analyzer ▪ by @egzumer ▪ Enhanced by @RE3CON: Full freq range of BK4819 for TX and RX: 14MHz ~ 630MHz and 760MHz ~ 1879 MHz "ENABLE_TX_UNLOCK". 2nd ToneBurst 1750Hz and 1050Hz = PTT + Sidekey 1, PTT + Sidekey 2.

A real-time push-to-talk server to route and broadcast voice messaging

Quansheng Wiki

A utility to convert from CHIRP CSV export files to the CXF file format used by the Quansheng UV-K5 radio CPS- now enhanced with GUI and DCS support

Smart Pi Radio Assistant is a smart home assistant that you can access via voice commands on a walkie talkie! Turn your Raspberry Pi into an IOT device that can control devices and reply to you via radio waves. It's fully customizable!

Walkie Talkie with Arduino Nano and nRF24L01