Alternatives and similar repositories for themes:

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

• AprilSylph / Filtering-Plus
  🚫 Filter tags or post content via right-click
  ☆17Updated 2 years ago
• AprilSylph / Palettes-for-Tumblr
  🎨 Colour scheme manager for Tumblr
  ☆37Updated this week
• AprilSylph / Outbox-for-Tumblr
  📤 Save outgoing Tumblr asks automatically
  ☆21Updated this week
• cicerakes / DarkNight-AO3
  A dark/night theme for archiveofourown.org.
  ☆16Updated 2 years ago
• rachaelthemes / themes
  Tumblr themes by Rachael | https://rachaelthemes.com
  ☆18Updated last year
• mutantstandard / web-emoji
  (WIP) Create accessible views and interactive emoji pickers for Mutant Standard using Elm.
  ☆9Updated last year
• mattlag / California-Gothic
  A typeface for California vexillographers
  ☆12Updated 5 years ago
• mutantstandard / forc
  Emoji font builder
  ☆27Updated last year
• nianeyna / fontbrowser
  View and organize fonts
  ☆13Updated 3 months ago
• krisu5 / userstyles
  UserCSS for Stylus (for AniList, DuckDuckGo, Imgur, Twitter & more)
  ☆15Updated last year
• VChet / StyleBase
  UserCSS theme sharing site
  ☆20Updated 3 years ago
• heyLu / numblr
  Alternative Tumblr (and Twitter, Instagram, AO3, RSS, ...) frontend.
  ☆35Updated last month
• cornetespoir / findtags-react
  ☆8Updated 2 years ago
• cornetespoir / build-a-theme
  make a tumblr theme without writing any of the code
  ☆31Updated last year
• theleagueof / the-neue-black
  Tré Seals’ first open-source font, a typeface based on the Chicago Freedom Movement.
  ☆21Updated 2 years ago
• Etcetera-Type-Co / Tourney
  3 axes/variable/no curves
  ☆32Updated 3 years ago
• geno7 / Rarebit
  a template for webcomic hosting intended for use with NeoCities, but it can be used virtually anywhere. created to be as user-friendly an…
  ☆48Updated last year
• weiweihuanghuang / Prodigy-Sans
  A grotesque sans.
  ☆76Updated 4 years ago
• cubeghost / tagreplacer
  tumblr tag replacer v2
  ☆16Updated 4 months ago
• rjaus / ublacklist-pinterest
  ublacklist to block all pinterest websites from google, ddg, bing
  ☆30Updated last week
• sursly / pageoflinks
  One page of links.
  ☆12Updated 3 years ago
• alexwlchan / finduntaggedtumblrposts.com
  A site for finding untagged Tumblr posts
  ☆25Updated 2 years ago
• sadgrlonline / yesterlinks
  A link database for discovering cool and interesting websites.
  ☆30Updated 2 years ago
• sadgrlonline / magnetic-poetry
  A customizable, browser-based and responsive magnetic poetry app.
  ☆22Updated 2 years ago
• StylusThemes / YouTube-Tweaks
  🎥 Tweaks for Youtube!
  ☆9Updated last week
• uxai / non-profit-bloggers
  A repository of blogs by bloggers who blog for the joy of writing.
  ☆15Updated last year
• indestructible-type / indestructible-type.github.io
  indestructible type* - official website
  ☆28Updated last month
• Thomashighbaugh / firefox
  Torturing Firefox with userchrome.js and userchrome.css in response to Mozilla's successive degradation of the browser window.
  ☆25Updated last week
• StigNygaard / Stigs_Flickr_Fixr
  Flickr Fixr - It makes Flickr awesome (again) ! :-) A browser extension (webextension) for Firefox and Chrome/Chromium based browsers
  ☆13Updated 3 weeks ago
• Graycot / loop-ring
  ☆11Updated 7 months ago