Learn about the wrong and right way to downsample a signal, with examples you can listen to.

See how a signal can be converted to the frequency domain and be approximately reconstructed.

See how the number of random points in a grid cell follows a Poisson distribution.

See how barycentric coordinates can be used to check if a point lies in a triangle

Simulate different Life-like cellular automata in your browser.

See how a parabolic mirror fails to focus off-axis rays.

See why a spherical mirror can never focus light to a point.

Visualize the relationship between the sine function and circles.

Play with water physics created using smoothed particle hydrodynamics.

Mess around with simulated springs.

Online multiplayer soccer game. Play with your friends by sending this link!

Classic Minesweeper.

Dodge asteroids and try to stave off your inevitable death

Now with 100% more explosions!

View the web in three glorious dimensions.

As per xkcd #1930.

Increase typing speed 35x

View random screenshots taken with Lightshot, which is horribly insecure.

Copy and paste commonly used punctuation symbols that cannot be typed on a standard keyboard, along with helpful usage tips.