Alternatives and similar repositories for userscripts:

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

• aesy / reddit-comment-highlights
  A browser extension with minimal permissions that highlights Reddit.com comments since you've been away
  ☆31Updated 8 months ago
• eight04 / linkify-plus-plus
  A userscript/extension which can linkify almost everything. Based on Linkify Plus.
  ☆118Updated last month
• darktrojan / betterimageviewer
  Better Image Viewer for Firefox
  ☆20Updated 3 years ago
• tom-james-watson / reddit-comment-collapser
  A more elegant solution for collapsing reddit comment trees
  ☆47Updated 11 months ago
• zanetu / direct_google_images
  Direct Google Images
  ☆24Updated 5 years ago
• TimidScript / UserScripts
  Userscripts for: Pixiv, DeviantArt, Nijie.info, NicoVideo Seiga,Google, Youtube and more
  ☆73Updated 10 months ago
• Infocatcher / Right_Links_WE
  WebExtensions port of Right Links extension for Firefox
  ☆28Updated 3 years ago
• Deathamns / Viewhance
  Enhancements for the browser's default media viewer
  ☆100Updated 2 years ago
• eight04 / select-text-inside-a-link-like-opera
  Disable link dragging and select text.
  ☆26Updated 5 years ago
• loadletter / mangaupdates-urlfix
  Userscript that adds website and IRC links on the groups pages of mangaupdates.com
  ☆63Updated 3 years ago
• JustOff / pm27-sdk-addons
  SDK-based extensions for Pale Moon 27.1+
  ☆22Updated 7 years ago
• idoenk / maknyos-autoin
  ☆27Updated 7 years ago
• Ede123 / greasy-scripts
  Firefox add-on which helps you find user scripts for your favorite sites!
  ☆18Updated 7 years ago
• ChoGGi / Stylish-Custom
  Custom additions to Stylish extension
  ☆13Updated 5 years ago
• schomery / youtube-hover
  Display a floating YouTube player when mouse is hover over a YouTube link
  ☆21Updated 7 years ago
• Zren / ResizeYoutubePlayerToWindowSize
  Userscript: Moves the YouTube video to the top of the website and fill the window with the video player.
  ☆161Updated 10 months ago
• ltguillaume / redshift-tray
  A no-frills GUI for the excellent Redshift, with some optional OS hotkeys
  ☆63Updated 6 months ago
• sumzary / yt2p
  Watch videos in an external player.
  ☆22Updated 6 years ago
• Ede123 / userscripts
  My humble collection of userscripts!
  ☆45Updated last year
• icpantsparti2 / browser-bits
  Bits of code/config/info/links for web browsers (mainly Firefox)
  ☆37Updated last year
• nezumisama / mpvmenu
  A pop-up menu for mpv
  ☆31Updated 6 years ago
• mustafakalash / royt
  Adds Reddit comments to Youtube videos!
  ☆44Updated 3 years ago
• Infocatcher / Custom_Buttons
  Buttons for Custom Buttons extension for Firefox (and other Gecko-based applications)
  ☆38Updated last year
• WhatIsThisImNotGoodWithComputers / webm-looper-userscript
  A userscript which automatically enables looping on Webm videos in your browser.
  ☆17Updated 7 years ago
• nokeya / direct-links-out
  Removes all "You are leaving our site" stuff from links
  ☆103Updated 3 years ago
• tripod31 / foo_lyricsource
  lyricsource component for foo_uie_lyrics3
  ☆49Updated 2 years ago
• reupen / console_panel
  Console panel for Columns UI
  ☆23Updated this week
• nikolay-borzov / user-scripts
  User scripts for Tampermonkey
  ☆29Updated last year
• NiklasGollenstede / unload-tabs
  WebExtension that unloads tabs and prevents tabs from loading
  ☆76Updated 4 years ago
• fuzetsu / userscripts
  Various browser userscripts I created/maintain
  ☆26Updated last week