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Meshenger is an open-source, serverless P2P voice and video calling app for Android that works over local networks or directly between devices without the internet. It facilitates direct communication using QR codes or IP addresses, bypassing the need for any central infrastructure or account registration. Meshenger is particularly suited for emergency scenarios, privacy-focused users, and mesh networks where conventional communication tools fail. It emphasizes minimalism, transparency, and full decentralization.

...Built on modern P2P networking technology, SyntroSend allows users to transfer files locally over the same WiFi network or globally through encrypted tunnels. There are no file size limits, no account requirements, and no data stored on external servers. Key features include end-to-end encryption, secure transfer codes, automatic resume for interrupted transfers, and file integrity verification. Users can easily select files or folders, generate a secure code, and share it with others to start instant transfers. SyntroSend is designed for simplicity, performance, and complete control over your data across all major platforms.

...It allows you to monitor CPU, memory, storage, temperature, uptime, and network throughput seamlessly across multiple devices. Operating through a lightweight Cloudflare Worker relay with zero accounts or complex port-forwarding required, PeekESP uses simple local pairing codes to connect agents and viewers securely. It supports Windows, Linux/DietPi, macOS, and Android, letting you keep tabs on your hardware effortlessly.

This app can be opened by clicking on contact or message or launched from menu. First you add recipients simply by writing the name and then you can add message text by scanning QR codes as many times as you want. It's very handy when replying because you don't have to open any additional QR scanner a rewrite recipient. Messages are then stored in standard "drafts" and "sent" folders.