Free Virtual Keyboard - Free Virtual Keyboard is a free, lightweight, multilingual and finger friendly virtual keyboard.
Numi App - Numi is a beautiful text calculator for Mac.
Onboard on-screen keyboard - An onscreen keyboard useful for tablet PC users and for mobility impaired users.
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 .
Comfort Keys Pro - Virtual keyboard, automation, shortcuts, flexibility, advanced clipboard management.
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.