I've relied on OneNote for years—it's free, feature-packed, and simplifies daily note-taking. Evernote was a past favorite too, until pricing pushed me away. Both shine (see our OneNote vs. Evernote comparison: Evernote vs. OneNote—Which note-taking app is right for you?).
Yet no app is perfect. On my new Chromebook, their web versions lag. They're powerful but bloated—heavy on resources. Often, speed trumps extras.
That's why I hunted lightweight alternatives. Great news: they exist. Trade some flexibility for snappy performance.
Available on web, Android, and iOS.

Web apps often disappoint with slowness, so I approached Thinkery skeptically. It exceeded expectations—super lightweight. Supports notes (rich text), tasks (checkable), and bookmarks (web clips). Tags handle organization.
Web version flies; mobile apps are older, with minor bugs possible.
Available on web, Windows, Mac, Linux, Android, and iOS.

Simplenote delivers pure simplicity—no bloat. Fast, clean, and visually appealing.
No notebooks; use tags or pin notes to top. Plain text by default, with per-note Markdown. Revision history saves snapshots for easy restores.
Available on web, Windows, Mac, and Linux.

Laverna prioritizes privacy—notes stay off servers. Sync via Dropbox or RemoteStorage; add encryption password.
Markdown with live preview, plus profiles, nestable notebooks, and tags. Distraction-free mode, code syntax highlighting, shortcuts, open-source on GitHub.
Available on Windows, Mac, Linux, and Android.

Turtl emphasizes security—no password recovery. Lose access, notes are gone—use cautiously.
Handles notes, files, images, bookmarks in visual boards (like notebooks). Tags for fine organization. Unique design may grow on you.
Available on Windows and Linux.

CherryTree was my go-to before OneNote. Lightweight, open-source, actively updated—top for Linux (7 Note-Taking Apps for Linux Productivity).
Rich text and syntax-highlighted code. Nested notes act as notebooks. Internal wiki-style links shine for interconnected ideas, like novel planning (4 Best Personal Wikis).
Available on Windows, Mac, Linux, Android, and iOS.

Fully offline—local files only, no internet pings. Sync via Dropbox/Google Drive. TXT, HTML, Markdown notes.
Folder-based organization. Interface clicks after setup. Pro unlocks advanced search, geotags ($40 one-time).
Available on web, Android, iOS, and Chrome.

For sticky-note fans, Google Keep excels—ideal for mobile. Color-coding, labels, voice notes, gestures (7 Google Keep Tips). Great for trips (Organize Travel with Keep) or projects (Project Management with Keep).
Don't overthink—app hunting wastes time (10 Time-Wasting Habits).
Test a few quickly. If none click, OneNote or Evernote might still suit best.
Other lightweight picks? Favorites or must-haves? Share below!