Alternatives and similar repositories for challengers:

Users that are interested in challengers are comparing it to the libraries listed below

• pippinbarr / chogue
  Look! Up in the sky! It's a Chess! It's a Rogue! No! It's Chogue! Faster than a Blitz Chess player who just drank a Potion of Haste! More…
  ☆19Updated 2 years ago
• motherboardgithub / archive_tweet
  A Twitter bot that archives tweets on demand.
  ☆26Updated 6 years ago
• 1j01 / retrores
  A catalog of cursors and icons from Windows 98, in original and modern formats
  ☆16Updated 6 months ago
• hyperobject / wiisnap
  Snap! + Wiimotes.
  ☆25Updated 2 years ago
• microformats / microformats.io
  Simple explainer site about Microformats.
  ☆8Updated last year
• MetalES / Project-Zelda
  Project Zelda, made using Solarus
  ☆12Updated 7 years ago
• videogamepreservation / mspacman-7800
  Ms. Pac-Man (1987) by General Computer Corporation for the Atari 7800
  ☆22Updated 9 years ago
• x-sheep / puzzles-unreleased
  Several unfinished contributions to Simon Tatham's Portable Puzzle Collection (sgtpuzzles)
  ☆20Updated 2 weeks ago
• apsillers / lords-of-the-fey
  An online turn-based HTML5 game, based on Battle for Wesnoth
  ☆10Updated last year
• grand-central-garbage / openttd-prometheus
  OpenTTD but with a prometheus metrics endpoint
  ☆28Updated 3 years ago
• bnjbvr / botzilla
  Matrix bot tuned for Mozilla's needs
  ☆25Updated 2 years ago
• westand / STiki
  The STiki anti-damage tool for wikis/Wikipedia
  ☆22Updated 6 years ago
• illacceptanything / illacceptanything.github.io
  ☆13Updated 5 years ago
• robjinman / pro_office_calc
  Just an ordinary calculator. Nothing to see here...
  ☆32Updated last year
• ilyaigpetrov / ncurses-for-emscripten
  ncurses 6.1 compiled by emscripten for usage in a browser. It is compiled, loaded, but doesn't work! You are wanted to make it work!
  ☆14Updated 5 years ago
• jonroig / finger.farm
  Finger.Farm Modern Finger Protocol Hosting... kind of a fingerd implementation in Node
  ☆43Updated 3 years ago
• slashme / WikipediaGlobePrintable
  Printable Wikipedia Globe pieces
  ☆14Updated 4 years ago
• michael-lazar / lets-dance
  💃 A Spring '83 Server
  ☆28Updated 2 years ago
• alienmelon / cat.js
  A tiny javascript cat that you can easily run on any page.
  ☆16Updated 5 years ago
• feiranchen / WitnessProtection
  in FPGA
  ☆16Updated 9 years ago
• joaomgcd / AutoPebble-Pebble-app
  This is an archive of the the AutoPebble Pebbble app's code that I'm no longer mantaining.
  ☆23Updated 7 years ago
• Lynnesbian / OldFediBooks
  A Python-based multiplatform markov fediverse bot creator and manager with an intuitive Qt-based GUI.
  ☆15Updated 5 years ago
• kevandotorg / nanogenmo-2015
  Around the World in X Wikipedia Articles
  ☆22Updated 7 years ago
• copyleft-org / copyleft-guide
  The Copyleft Guide is the definitive book on copyleft. Also included are various tutorials & education materials for GPL and its enforce…
  ☆10Updated 6 years ago
• chromakode / xkcd-pixels
  The frontend code behind "Pixels".
  ☆150Updated 10 years ago
• mastodon / fediverse_discovery_providers
  Website of the Fediverse Discovery Providers project
  ☆14Updated 2 months ago
• phiresky / encrypted-gist
  Storing files in github gists, with client side transparent encryption and authentication
  ☆28Updated 6 years ago