SpeedCrunch - SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .
ProPay - ProPay is a multiple payment making service provider that lets its users to make payment to anyone in any part of the world.
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.
Braintree - An all-in-one solution to accept, process, and split payments in your mobile app or online - from small business to large enterprise.
Soulver - Soulver is a software application that functions as a calculator that allows you type a continuous stream of information rather than having to input data into multiple cells.
XE.com - XE.com Inc. (XE) is a Canadian online foreign exchange services company.