SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. Developed by SpeedCrunch.Org
License: Open Source
Soulver is designed for simplicity and ease of use, particularly for financial calculations, while SpeedCrunch is more powerful with advanced features like graphing and programming support. Users seeking a straightforward calculator will prefer Soulver, whereas those needing complex calculations and graphing will benefit from SpeedCrunch.