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Skim

brew install --cask skim v1.7.15

PDF reader with integrated note-taking and highlighting tools.

Why you might care

Skim is open-source and purpose-built for academics—it excels at annotating PDFs with notes, highlights, and bookmarks while keeping them organized. Native macOS app with a clean interface, particularly valued by students and researchers who need to mark up papers and textbooks efficiently.

Categories

Alternatives

Apple Preview PDF Expert PDFpenPro
1.4k
30-day installs · #242
4.1k
90-day · #248
13.5k
365-day · #248

Links

Blurb generated by claude-haiku-4-5 on today.

Raw metadata
{
  "alternatives": [
    "Apple Preview",
    "PDF Expert",
    "PDFpenPro"
  ],
  "artifacts": [
    {
      "app": [
        "Skim.app"
      ],
      "target": "/Applications/Skim.app"
    },
    {
      "binary": [
        "$APPDIR/Skim.app/Contents/SharedSupport/displayline"
      ],
      "target": "$HOMEBREW_PREFIX/bin/displayline"
    },
    {
      "binary": [
        "$APPDIR/Skim.app/Contents/SharedSupport/skimnotes"
      ],
      "target": "$HOMEBREW_PREFIX/bin/skimnotes"
    },
    {
      "binary": [
        "$APPDIR/Skim.app/Contents/SharedSupport/skimpdf"
      ],
      "target": "$HOMEBREW_PREFIX/bin/skimpdf"
    },
    {
      "zap": [
        {
          "trash": [
            "~/Library/Application Support/com.apple.sharedfilelist/com.apple.LSSharedFileList.ApplicationRecentDocuments/net.sourceforge.skim-app.skim.sfl*",
            "~/Library/Caches/com.apple.helpd/Generated/net.sourceforge.skim-app.skim.help*",
            "~/Library/Caches/net.sourceforge.skim-app.skim",
            "~/Library/Cookies/net.sourceforge.skim-app.skim.binarycookies",
            "~/Library/HTTPStorages/net.sourceforge.skim-app.skim",
            "~/Library/Preferences/net.sourceforge.skim-app.skim.bookmarks.plist",
            "~/Library/Preferences/net.sourceforge.skim-app.skim.plist",
            "~/Library/Saved Application State/net.sourceforge.skim-app.skim.savedState"
          ]
        }
      ]
    }
  ],
  "auto_updates": 1,
  "categories": [
    "pdf",
    "note-taking",
    "reader"
  ],
  "deprecated": 0,
  "deprecation_reason": null,
  "desc": "PDF reader and note-taking application",
  "disable_reason": null,
  "disabled": 0,
  "display_name": "Skim",
  "enrichment_fetched_at": "2026-06-20T22:49:31+00:00",
  "first_seen": "2026-06-20T00:47:34+00:00",
  "full_token": "skim",
  "github_default_branch": null,
  "github_last_commit_at": null,
  "github_readme_excerpt": null,
  "github_repo": null,
  "github_stars": null,
  "github_topics": [],
  "homepage": "https://skim-app.sourceforge.io/",
  "homepage_og_description": null,
  "homepage_og_image": null,
  "homepage_title": "Skim | Home",
  "installs_30d": 1382,
  "installs_365d": 13517,
  "installs_90d": 4080,
  "last_seen": "2026-06-20T00:47:34+00:00",
  "llm_generated_at": "2026-06-20T23:03:30+00:00",
  "llm_model": "claude-haiku-4-5",
  "names": [
    "Skim"
  ],
  "one_liner": "PDF reader with integrated note-taking and highlighting tools.",
  "rank_30d": 242,
  "rank_365d": 248,
  "rank_90d": 248,
  "raw_hash": "81ee4fa24058d0f1",
  "ruby_source_path": "Casks/s/skim.rb",
  "tap": "homebrew/cask",
  "token": "skim",
  "version": "1.7.15",
  "why_use_this": "Skim is open-source and purpose-built for academics\u2014it excels at annotating PDFs with notes, highlights, and bookmarks while keeping them organized. Native macOS app with a clean interface, particularly valued by students and researchers who need to mark up papers and textbooks efficiently."
}