Calculator++

I've been using this Java-based calculator for a while now, and I have to say, it's been a game-changer for me. First of all, it's built for multiple platforms, so no matter what computer I'm using, I can access it.

But what really makes this calculator stand out is its ability to handle arbitrary-precision and scientific calculations. I can input huge numbers with dozens of decimal places, and the calculator won't skip a beat. It's also packed with scientific functions, including various trigonometric and logarithmic functions that I find myself using all the time.

And if I need to do some unit conversions, this calculator has got me covered. It can convert between all kinds of different units, from temperature to distance to mass. Plus, the interface is straightforward and easy to use, with plenty of opportunities to customize the look and feel to suit my preferences. Overall, I'd highly recommend this calculator to anyone looking for a powerful, versatile, and reliable tool for their mathematical needs.