https://beyondloom.com/decker/index.html

Decker

Decker is a multimedia platform for creating and sharing interactive
documents, with sound, images, hypertext, and scripted behavior. You
can try it in your web browser right now.

                               [wings]

Decker builds on the legacy of HyperCard and the visual aesthetic of
classic MacOS. It retains the simplicity and ease of learning that
HyperCard provided, while adding many subtle and overt
quality-of-life improvements, like deep undo history, support for
scroll wheels and touchscreens, more modern keyboard navigation, and
bulk editing operations.

Anyone can use Decker to create E-Zines, organize their notes, give
presentations, build adventure games, or even just doodle some 1-bit
pixel art. The holistic "ditherpunk" aesthetic is cozy, a bit
nostalgic, and provides fun and distinctive creative constraints. As
a prototyping tool, Decker encourages embracing a sketchy, imperfect
approach. Finished decks can be saved as standalone .html documents
which self-execute in a web browser and can be shared anywhere you
can host or embed a web page. Decker also runs natively on MacOS,
Windows, and Linux.

For more complex projects, Decker features a novel scripting language
named Lil which is strongly influenced by both Lua, an imperative
language popular for embedding in tools and game engines, and Q, a
functional language in the APL family used with time-series
databases. Lil is easy to learn and conventional enough not to ruffle
any feathers for users with prior programming experience, but also
includes pleasant surprises like implicit scalar-vector arithmetic
and an integrated SQL-like query language. A few lines of Lil can go
a long way.

                               [calc]

Decker is command-line friendly: when built from source, it comes
with Lilt, a standalone Lil interpreter which can (among other
things) read, write, manipulate, and even execute Decker documents
"headlessly". Lilt has even fewer dependencies than Decker itself.
Decks are stored in a line-oriented text format which interoperates
well with existing source control tools like Git and SVN.

Decker includes no advertising, telemetry, gamification, or other
intrusions on user privacy and autonomy. If you like Decker, please
share it with other people who might enjoy it. Build something that
makes you happy.

Documentation

  * Decker: A Guided Tour (Deck)
  * 5GUIs (Deck)
  * The Decker reference manual
  * The Decker document format
  * The Lil programming language
  * Lilt: the Lil Terminal

Additional Resources

Browsable source code and a bugtracker are available on GitHub.
Decker is free and open-source, under a permissive MIT license.

Periodic binary releases for MacOS and Windows are available on
Itch.io. The Itch page includes a community forum for discussing
Decker and sharing user projects.

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