i-e-b 

A process host for Windows (Vista and later) that is more reliable and flexible than System.Diagnostics.Process

A distributed contracts-based sender/handler messaging system built on RabbitMQ and BearBones-Messaging

A HTTP client that can accept a reasonable level of invalid protocol from servers. This is a blocking, synchronous library that uses only .Net sockets, not WebClient or HttpWebRequest, and has a lot of replaceable components. High transfer speeds, and uses minimal memory. An old and battle hardend... More information

An extension that helps with building installers for .Net applications and websites with WiX. It's like Heat, but simpler and more focused for .Net development.

BearBones messaging: lower-level framework, part of a contract-interface based distributed event framework for .Net

A File path library that is less wrong-headed than System.IO.Path

A library to make multi-threaded dispatch code more testable. Models a job dispatch pattern and provides both threaded and non threaded implementations.

Integration test harness for ASP.Net MVC 5. Allows you to fully integration test an MVC web project without needing to host under IIS or similar. Allows access to both server state and client responses in a single assertion.

A thread-safe, multi-process(ish) persistent queue, based very heavily on http://ayende.com/blog/3479/rhino-queues-storage-disk . Stores serialised data to the local file system for reading either later or concurrently

Object-Tree validation tools. Simple and readable validation of the structure and data of any object tree. Validation assertions can be either INamedPredicates or NUnit assertion constraints.

A simple library that helps keep a Hub and it's C# clients in sync, using shared strongly typed contracts (i.e. Interface types and their methods and properties)

A snapshot of service stack binaries merged into a single DLL This makes working with the fast moving service stack repository easier in a large code base

A simple C# generator for HTML/XML Why? Sometimes you have a project where a lot of code is needed to output a little markup. For those projects, markup templating engines make things more difficult, and a lot of the time you end up doing string concatenation. T·g is a step up from string... More information

A simple and small JSON (de)serialisation library, focused on simple interactions with contract-based workflows.

Some containers and base classes for general C# development

A log message management system and exploration UI, in a similar vein to Swagger. Contains an expressive templating system.

Library to load, host and run ASP.Net websites inside your own process. Has functionality equivalent to the IIS Developer server. Can expose IP ports or keep sites internal to your process. Supports .Net MVC and Web APIs

A simple and small JSON (de)serialisation library

Tiny object proxying tools for C#

Multi-file compression with long path support and good compression when source has many duplicate files The C# version specifically uses only standard GAC dependencies so it can be included in .msi installers.