FsHttp is a .NET HTTP client library for F# (and C#) that provides a fluent, composable DSL for constructing and sending HTTP requests. It offers both a computation expression (CE) syntax for F# and extension methods for C#, supporting all standard HTTP methods, headers, cookies, multipart form data, file uploads, and various body content types (text, JSON, binary, streams, form-urlencoded). The library wraps System.Net.Http and provides rich response handling including streaming, JSON parsing (System.Text.Json by default, with optional FSharp.Data and Newtonsoft.Json integrations), XML parsing, file saving, and status code assertions. It features a configurable pipeline with transformers for headers, URLs, HttpClient, and HttpRequestMessage, as well as per-request and global configuration. The library is designed for both interactive use (F# Interactive / notebooks) and production applications, with built-in FSI printing and debug logging. The codebase is well-structured with clean domain models, a modular DSL implementation, and comprehensive test coverage using Suave for local test servers.

FSharp.Formatting is a mature, production-grade documentation generation toolchain for the F# ecosystem. It consists of several libraries (Markdown parsing, code syntax highlighting with F# Compiler Service integration, API documentation generation from XML doc comments, literate programming support for .fsx and .ipynb files) and a CLI tool (`fsdocs`) that builds static documentation websites with search, theme toggling, and a live-reload dev server. The system is primarily a developer tool used by F# projects to produce API reference sites and literate documentation. Its architecture is modular: the Markdown parser, code formatter, literate processor, and template engine are separate libraries that can be used independently. The CLI orchestrates these libraries, cracking MSBuild projects for metadata, evaluating code via F# Interactive, and generating output in HTML, LaTeX, Markdown, and Jupyter notebook formats. External dependencies include the F# Compiler Service, Newtonsoft.Json, and a bundled version of Yaaf.FSharp.Scripting. The codebase demonstrates deep integration with the F# compiler's type-checking and symbol resolution APIs, but also shows signs of organic growth: duplicated test data, a legacy C# MarkdownSharp project, and some conditionally compiled code for .NET Framework compatibility.