BrewMonitor is an open source project that started way back in 2011 with a simple Netduino based airlock and temperature sensing prototype.
The goal of the BrewMonitor project has always been to monitor and record the progress of your fermentation to keep you more connected throughout its duration.
A secondary objective has been to add control capabilities to manage your fermentation fridge or heater belt, but this has always posed a challenge with the required safety testing regimes and the upfront costs involved.
The main BrewMonitor repo is hosted over here at Github and you can find the source code and some screenshots there for now.
The BrewMonitor.net domain was originally used to host a web application that allowed users to push data, much like Pachube of its day. In the near future it may serve as a location to push and store cloud data once again.