7-Zip

7-Zip is a free, open-source file archiver that opens almost everything and compresses tighter than most paid rivals. A plain interface is the only real cost.
WinRAR

WinRAR is Windows archiving software that compresses, encrypts, and repairs files, and its free trial never really shuts off. The real question is whether that beats 7-Zip.
Rufus

Rufus is the bootable USB tool most technicians reach for first: a free, open source Windows utility that turns a spare stick into working install media in minutes.
CCleaner

CCleaner is a PC cleaner for junk files, browser traces, and uninstall leftovers on Windows, Mac, Android, and iOS. The free tier still does the real work.
Internet Download Manager

Internet Download Manager speeds up big downloads and resumes broken ones, but the 30-day trial turns into a paid license once it runs out.
Advanced SystemCare Free

Advanced SystemCare is a Windows system utility that cleans, speeds up, and locks a cluttered PC down in one dashboard, worth weighing against a leaner cleaner.
Sumatra PDF
Sumatra PDF is a free, no-frills PDF reader that opens files on Windows almost instantly, without Adobe’s bloat. See who it actually fits.
LibreOffice

LibreOffice is a completely free, open source Office & Productivity suite covering six apps, though heavily formatted Word and Excel files don’t always translate perfectly.
Mozilla Firefox

Mozilla Firefox is a free, open-source web browser that runs on its own independent engine, built around strong privacy defaults and deep customization.
Brave

Brave Browser blocks ads and trackers automatically, then adds a search engine, an AI assistant, and a crypto wallet. What this browser gets right, and where it doesn’t.