Log outgoing HTTP requests made from your application. Helps with debugging pesky API error responses, or just generally understanding what's going on under the hood. In theory, it should also work with any library built on top of these. But the difference between theory and practice is bigger in practice than in theory. This is very much a development and debugging tool; it is not recommended to use this in a production environment as it is monkey-patching the respective HTTP...
Simple, but flexible HTTP client library, with support for backends
Faraday is an HTTP client library abstraction layer that provides a common interface over many adapters (such as Net::HTTP) and embraces the concept of Rack middleware when processing the request/response cycle. You probably don't want to use Faraday directly in your project, as it will lack an actual client library to perform requests. Instead, you probably want to have a look at Awesome Faraday for a list of available adapters. The best starting point is the Faraday Website, with its...
rhttpd is a small webserver which tries to be fast in handling HTTP transactions and a bit flexible. At the moment rhttpd's portability is limited to Linux2.6.