Here are some examples of popular GUIs in use today:

1. Operating Systems:

    - Windows 10 (Microsoft)

    - macOS (Apple)

    - Linux distributions (e.g., Ubuntu, Fedora)

2. Web Browsers

    - Google Chrome

    - Mozilla Firefox

    - Microsoft Edge

    - Safari (Apple)

3. Mobile Devices

    - iOS (Apple)

    - Android (Google)

4. Desktop Applications

    - Microsoft Office (Word, Excel, PowerPoint)

    - Adobe Creative Cloud (Photoshop, Illustrator, InDesign)

    - Slack (communication platform)

5. Productivity Software

    - Trello (project management)

    - Asana (task management)

    - Evernote (note-taking)

6. Media Players

    - VLC Media Player

    - Windows Media Player

    - iTunes (Apple)

7. Gaming Consoles

    - PlayStation (Sony)

    - Xbox (Microsoft)

    - Nintendo Switch

8. Smart Home Devices

    - Amazon Echo (Alexa)

    - Google Home

    - Apple HomePod

These GUIs are widely used and have become an integral part of our daily lives, making it easy to interact with technology and access various services and applications.