VoCat

Tailcat is an open-source Go CLI and library from Tailscale that provides Netcat-style connections over Tailscale's encrypted data plane without using the Tailscale control plane or requiring a Tailscale account. A server generates a connection token containing WireGuard and relay metadata; a client uses the token to establish an end-to-end encrypted tunnel, initially through a DERP relay, while magicsock attempts NAT traversal and a direct peer-to-peer UDP connection. Its userspace networking stack does not alter routing tables, DNS settings, or require root access. The CLI can pipe standard input and output between machines, forward local TCP ports, provide an unauthenticated SSH server, run commands through a SOCKS5 proxy, act as an exit node, ping and inspect connection tokens, and publish tokens through DNS TXT records. The Go library exposes server and client APIs for dialing TCP ports through the tunnel. Tailcat can use Tailscale's public rate-limited DERP relays or user-operated relays, and an experimental WebAssembly browser demo supports file and text transfer. The project states that its CLI, API, and wire format have no stability guarantees.

RevenueCat is a subscription and in-app-purchase platform for mobile, smart TV, and web apps. It provides a subscription backend that simplifies purchase implementation, automates receipt validation across StoreKit, Google Play, smart TV, and web, and maintains a unified view of customer and subscription data. Its product tools include configurable paywall templates, audience targeting for paywalls and pricing, A/B testing, subscription analytics, predictive campaign analysis, and web-to-app monetization. The service is free until an app reaches $2,500 in monthly tracked revenue, according to its website.

Pipecat is an open-source Python framework maintained by Daily and the community for building real-time voice and multimodal conversational agents. It orchestrates audio and video, transports such as WebSockets and WebRTC, speech recognition and text-to-speech services, speech preprocessing, turn detection, model calls, tool calls, and streamed audio through composable conversation pipelines. Pipelines can operate as single agents or as multi-agent systems whose specialists hand off, fan out in parallel, or coordinate over a shared bus locally or across processes and machines. The project also provides a CLI for scaffolding, monitoring, and deploying agents, along with client SDKs and related tools for structured conversations and pipeline debugging.

vphone-cli is an open-source macOS command-line tool for creating and running virtual iPhones with Apple's Virtualization.framework and PCC research VM infrastructure. It targets Apple Silicon Macs running macOS 15 or later and automates the VM workflow from IPSW download and patching through DFU restore, custom firmware installation, and first boot. The tool supports multiple firmware patch variants, VM creation and management, SSH and VNC connections, IPA installation, and export/import or APFS cloning of VM bundles. Its host control socket provides programmatic screenshots, touch and swipe input, hardware-key events, and clipboard operations, with each action returning an inline screenshot; the repository also describes an MCP server named vphone-mcp for AI-driven end-to-end testing. Operation requires Xcode and the iOS SDK, several Homebrew dependencies, and macOS SIP/AMFI relaxation to permit the required private virtualization entitlements.

cat-catch is an open-source browser extension for sniffing and listing resources used by the current webpage, including media resources. It supports Chrome, Edge, Firefox, and Edge for Android, and includes capabilities related to M3U8 and video downloading. The extension processes collected information locally and states that it contains no trackers or remote data transmission. It is distributed under the GPL-3.0 license; version 1.0 used the MIT license.