calbucci 

An easy to use way to track exceptions, errors and other code conditions for logging purpose. Built-in support for email logging. Can be extended to work with file system, database, NoSQL, Twilio SMS, etc.

A fast HTML Parser using an event-based system (similar to XML-SAX parsers).

The easiest way to read/write HTTP Cookies as POCO classes (open source: http://github.com/calbucci/CalbucciLib.SmartCookie).