nocc is a distributed C++ compiler system designed to accelerate C++ compilation, particularly for large projects with frequent rebuilds. It consists of three main components: a lightweight C++ wrapper (`nocc`) that pipes compiler commands to a Go daemon (`nocc-daemon`), which in turn coordinates with Go-based compilation servers (`nocc-server`). The system uses remote source and object caching to avoid re-uploading unchanged files and recompiling unchanged code, features an own includes parser for faster dependency detection than invoking the C++ preprocessor, supports precompiled headers compiled remotely, and provides local fallback when remote servers are unavailable. The architecture maintains persistent gRPC connections between daemons and servers while client processes start and die per compilation job, making it well-suited for build systems like CMake or KPHP that launch many parallel compilation processes.

The VK iOS SDK is a library for integrating iOS applications with the VK (VK.com) social network. It provides authentication via OAuth, API request execution with JSON parsing into model objects, and UI components for sharing, authorization, and captcha handling. The SDK features a modular architecture with distinct layers for networking (VKRequest, VKHTTPClient), API method wrappers (VKApi), dynamic object mapping (VKApiObject), and resource management (VKBundle). Key entry points include the VKSdk singleton for session management, VKApi for convenient API calls, and VKAuthorizeController/VKShareDialogController for UI flows. The SDK relies on system frameworks (UIKit, Foundation, WebKit) and includes an example demonstration application. While the codebase shows strong engineering in reusable components like VKRequest and VKApiObject, it exhibits some technical drift through deprecated APIs (UIAlertView) and version discrepancies between documentation and podspec.