PeStudio is a portable tool that performs malware assessments on executable files. Since the target file is never launched during the course of the investigation, you can safely evaluate the file, in addition to malware, without risk.
Opera Web Browser is a free web browser that originally started as a research project back in 1995 and today continues to be a fast, safe and secure web browser. Portable version available here. Video walkthrough available.
Process Monitor Portable is an advanced monitoring tool, now available via PortableApps, that displays real-time file system, registry, and process/thread activity. Regular Process Monitor is also available.
GIMP Portable is the full-featured image and photo editor bundled with a PortableApps.com launcher as a portable app so that you can edit your photos and images on the go. The latest stable installer is available for download here.
K-Lite Mega Codec Pack is a collection of components needed for audio and video playback in DirectShow players such as Windows Media Player, Media Center, and Media Player Classic. This is the latest beta, the latest stable K-Lite Mega Codec Pack can be downloaded here.
K-Lite Codec Pack Full is a collection of components needed for audio and video playback in DirectShow players such as Windows Media Player, Media Center, and Media Player Classic. This is the latest beta, the latest stable K-Lite Codec Pack Full can be downloaded here.
Mozilla Firefox 92.x is a fast, free, and Open Source web browser that provides you with a highly customizable interface with numerous third-party add-ons, as well as multiple Mozilla authored add-ons.
MajorGeeks Windows Tweaks contains over 200 files, including registry, PowerShell, Visual Basic, shortcuts, and batch files to enable tweaks and hidden features in Windows 11, 10, 8, and 7 for any skill level. You can browse all of the tweaks individually here.