OpenStickies (Free)

Desktop sticky notes that stay visible while you work.

- Stick images & GIFs of loved ones, memes, or decorations
- Organize desktop files and folders into small editable links
- Keep notes and to-dos always visible above other windows
- Set reminders with desktop notifications

Features:
• Fully customizable: font, color, size, background images/GIFs
• Drag files and folders in, rename them, drag them back out
• Hover over images and PDFs to quick preview them
• Automatic code detection when pasting (~50ms)
• Snap to grid for organizing stickies on desktop
• Customize local and global keyboard shortcuts
• Always on top, pin notes to lock position and content
• Export to TXT, Markdown, or JSON — no vendor lock
• 11 languages including RTL Arabic
• Multi-monitor support

Free version: 5 notes, 1 active reminder, 1 GIF background.
Unlimited at https://openstickies.com/pricing