PHP Easy Ticket System is a full blown help desk application that you can use for support, reports, errors, feedback, or a help desk. It has administration control and users can check how their tickets are coming along.
Luneta is a Web interface and engine to monitor resources and services over the Internet. If something is wrong, you receive an email. If it is ok again, you receive another email.
A Python library that lets you to define, optimize, and evaluate mathematical expressions involving multi-dimensional arrays.
An embeddable platform for creating Google-like searching for any database or application.