Portable version option with Vivaldi

Within the Vivaldi web browser installer, an option is available to use a standalone portable version.  Within the initial dialog box, click on the Advanced button.

Select Install standalone under the Installation Type drop-down menu.

To update the standalone version, use the  Help -> Check for Updates.

Google Chrome "Guest Mode"

Google Chrome within ChromeOS has had a "Guest Mode" for some time.  But the same feature is now available for other platforms such as Windows.  Using this option,  Chrome will delete all browsing activity from the computer after exiting the browser.

To use this option, launch Chrome with the command line switch --guest.

Free alternatives to Visio

Below are a few free alternatives to Microsoft Visio.

https://docs.google.com/drawings

https://app.diagrams.net/

https://www.lucidchart.com/

Sandboxie

Sandboxie is an old utility that originally attempted to "sandbox" Internet Explorer within Windows.  The application now has been released as open-source.

https://www.sandboxie.com/

https://news.sophos.com/en-us/2020/04/09/sandboxie-is-now-an-open-source-tool/

Photopea

Photopea is an online photo editor.

https://www.photopea.com/

Wazuh

Wazuh is an open source security monitoring solution for threat detection, integrity monitoring, incident response and compliance.  Agents are available for Windows, Linux, and MacOS.

https://wazuh.com/

XODO

XODO is an online PDF editor.

https://www.xodo.com/