In Chrysoberyl parlance, a gewgaw is the digital version of a bagatelle (music) or a doodle (visual art). It almost always involves visuals (usually animated), sometimes audio, and occasionally interaction.
A special kind of gewgaw, for which there is a whole historical "scene", is the "demo". We avoid that terminology here, partly because it has other useful meanings, and partly because demos have a certain thrust which gewgaws need not have (pushing the limits of a computer, being very visually/aurally impressive, sending "greetings" to other demosceners, etc.)
by Cat's Eye Technologies
A minimalist critique of Tetris.
This is an animated version of the "non-random walk" on p. 72 of Mathematical Circus by Martin Gardner.
A simulator that lets you experience the thrills and spills of the fascinating world of art restoration.
An interactive concrete poem about black holes.
A circle-based time-lapse space-filler.
A simple fractal (each rectangle contains four smaller rectangles) with colour variance and configurable glitching.
A spiral made up of semicircles with proportions in the Fibonacci sequence.
A simple interactive entertainment, intended to be experienced on a touchscreen device.
An animated "plate" depicting a proto-cohort of Heronsis hermnonicii.
Your web browser is burdened by the sins of its ancestors and their shower drains.
A "livetextmangler" — an online tool which transforms text. As you select different filters to apply to the input, the output is updated in real-time. Can also be used on the command-line.
Animated op art: an interactive bleeding of colours.
A generated animation involving randomness and not-so-much randomness.
An animated impressionistic depiction of the prairies.
An animated mathematical function, depicted in four different ways.
A simulation of undulating tentacles. It starts off alright, but soon starts doing things real tentacles never do, because they have damping.
An online tool/amusement where you paste in some text and it displays the text with repeated words removed.
A graphical depiction of the first two hundred and fifty-six natural numbers, in base four, using coloured squares with potentially varying assignments of colours to digits.
An experimental animation employing gradients and randomly-constructed transformation matrices.
An interactive, navigable, animated thing based on several tracings of a still from a film.
Ribos (Apr 2007)
A simple Commodore 64 graphics demo that uses the raster interrupt facility of the VIC-II chip: the colour of the border of the screen is inverted, but only in the middle part of the screen. Includes well-commented source in 6502 assembly language.
The PETulant Cursor (ca 1989)
A tiny (44 byte) "display hack" for the Commodore 64.