For Android:
- Google Keep: A versatile note-taking app that allows you to create sticky notes, reminders, and lists.
- Microsoft OneNote: A robust note-taking app that offers sticky note functionality among other features.
- Sticky Notes Widget: Specifically designed for creating sticky notes on your home screen.
You can download these apps from the Google Play Store.
For PC:
- Microsoft Sticky Notes: Comes pre-installed with Windows and allows you to create and manage sticky notes easily.
- Simple Sticky Notes: A lightweight application that lets you create customizable sticky notes on your desktop.
- Notezilla: A feature-rich sticky notes app with options for syncing across devices.