Oneko displays an animated cat or dog that chases the mouse pointer---now an actual mouse or a bone---around the screen while you work.

It was written for the X Window system and does not work well on Wayland.

The filters collection harks back to the late 1980s, when various text filters were written to munge written language in amusing ways. The earliest and best known were legends such as the Swedish Chef filter and B1FF.

This package contains the following filter commands:

1. b1ff: a satire of a stereotypical Usenet newbie

2. censor: comply with the CDA

3. chef: convert English to Mock Swedish

4. cockney: Cockney English

5. elee: k3wl hacker slang

6. fanboy: a stereotypical fan (supports custom fandoms)

7. fudd: Elmer Fudd

8. jethro: hillbilly text filter

9. jibberish: a random selection of these filters

10. jive: Jive English

11. ken: turn English into Cockney

12. kraut: a bad German accent

13. ky00te: a very cute accent

14. LOLCAT: as seen in Internet GIFs everywhere

15. nethackify: wiped-out text as found in nethack

16. newspeak: à la 1984

17. nyc: Brooklyn English

18. pirate: talk like a pirate

19. rasterman: straight from the keyboard of Carsten Haitzler

20. scottish: fake Scottish (Dwarven) accent

21. scramble: scramble the "inner" letters of each word

22. spammer: turn honest text into something liable to be flagged as spam

23. studly: studly caps.

24. uniencode: use glorious Unicode to the fullest possible extent

25. upside-down: flip the text upside down

The GNU project hosts a similar collection of filters, the GNU talkfilters.

lolcat concatenates files and streams like regular cat, but it also adds terminal escape codes between characters and lines resulting in a rainbow effect.

This package provides a Puppet grammar for the Tree-sitter library.

This package provides a Java properties grammar for the Tree-sitter library.

This package provides a JavaScript(JSX) grammar for the Tree-sitter library.

This variant provides Python bindings.

This package provides a Erlang grammar for the Tree-sitter library.

This package provides a JSDoc grammar for the Tree-sitter library.

This package provides an Arduino grammar for the Tree-sitter library.

This package provides a Starlark grammar for the Tree-sitter library.

This package provides a TOML grammar for the Tree-sitter library.

This package provides a Julia grammar for the Tree-sitter library.

Tree-sitter is a parser generator tool and an incremental parsing library. It can build a concrete syntax tree for a source file and efficiently update the syntax tree as the source file is edited.

Tree-sitter aims to be:

1. General enough to parse any programming language.

2. Fast enough to parse on every keystroke in a text editor.

3. Robust enough to provide useful results even in the presence of syntax errors.

4. Dependency-free so that the runtime library (which is written in pure C) can be embedded in any application.

This package includes the tree-sitter command-line tool.

This package provides a Clarity grammar for the Tree-sitter library.

This package provides a JSON grammar for the Tree-sitter library.

This package provides a NetLinx grammar for the Tree-sitter library.

This package provides a TLA+ grammar for the Tree-sitter library.

This package provides a FIRRTL grammar for the Tree-sitter library.

This package provides a gst-launch-1.0 grammar for the Tree-sitter library.

This package provides a Clojure grammar for the Tree-sitter library.

This package provides a Solidity grammar for the Tree-sitter library.

This package provides Markdown (CommonMark Spec v0.30) grammars for the Tree-sitter library.

This package provides a Chatito grammar for the Tree-sitter library.

This package provides a HTML grammar for the Tree-sitter library.

This variant provides Python bindings.