phpipam open-source IP address management
IP Address Management - CMDB - Ticketing - DNS and Zone Management
Calculates income tax form entries, helps do your taxes.
Calculates the voltage across a liquid junction between two solutions
Cross-platform encrypted password and file database
EuroNCAP Grid Point Calculator
Powerful Calculus Environment and Matrices Handling Engine
Auction Calculator
A compliation of Physics derived claculators
A simple stop smoking calculator that creates a profile for people