java scientific calculator
GNU General Public License version 2.0 (GPLv2)
https://sourceforge.net/projects/jscicalc/

A desktop calculator/scientific calculator. Use as desktop/graphical calculator, web applet, or to show calculator operations: arithmetic, trigonometry, logarithms, complex numbers, memory, statistics. Features four bases, copy and paste, and history

Features
Scientific Calculator in Java
Handles standard scientific calculator functions