Alternatives to SKTools for all platforms with any license

CCleaner

Cleaner tool for your system - protects your privacy, makes your computer faster and more secure.
- Bundleware
  - The software tries to install Avast too - Spyware, runs in background and collects information to send to Avast. Background mode can be disabled, but gets re-enabled on each run - Shows pop-up system wide ads from time to time
Freemium Mac Windows Android Android Tablet
Optimal performance Portable Real-time monitoring System Cleanup ... System Cleanup Duplicate File Finder Software Uninstallers Add a feature

2629 Like
BleachBit

BleachBit deletes unnecessary files to free valuable disk space, maintain privacy, and remove junk. Rid your system of old clutter including cache, cookies, Internet...

Free Open Source Mac Windows Linux Blackberry PortableApps.com
Cross-platform Works in a terminal Ad-free System Cleanup ... Multiple languages Portable Selective Wipe Add a feature

477 Like
Glary Utilities

Easy, one-click access to a large array of cleaners and boosters to optimize PC and Android performance.
- Bundleware
  Be careful during the installation: https://alternativeto.net/discussions/applications/11718/be-careful-in-the-installation/
Freemium Windows Android
System Cleanup Registry repairing Software Uninstallers Duplicate File Finder ... Utilities that Delete Files File Splitting Multiple languages Portable Real-time Junk Monitoring File Recovery Software Uninstallers Add a feature

341 Like
Sysinternals Suite

The Sysinternals Troubleshooting Utilities have been rolled up into a single Suite of tools. This file contains the individual troubleshooting tools and help files. It...

Free Windows
Configurable Portable System Info Add a feature

254 Like
SD Maid

File manager, search tool, removes orphaned files, freeze/reset/remove apps, optimize databases, find big files.

Freemium Android Android Tablet
System Cleanup Duplicate File Finder Root required Add a feature

48 Like
Ultimate Windows Tweaker

Ultimate Windows Tweaker is a freeware Tweak UI Utility for tweaking and optimizing Windows. It can simply be downloaded and used as a portable application to customize...

Free Windows
Portable System Tweaker Windows 10 Add a feature

45 Like
AVG PC TuneUp

Make your old PC live longer — and your new PC run faster — with AVG TuneUp. Our PC optimizer comes with revamped Sleep Mode technology to boost your PC speed and...

Commercial Windows
Battery Saving System Cleanup Duplicate File Finder Utilities that Delete Files ... File Recovery Registry repairing Software Uninstallers System Info Add a feature

147 Like
Clean Master

Clean Master is an all-in-one cleaner app on Android for cleaning app cache, unused files, residual files, search history and uninstalling apps. With this apps user can...

Freemium $ $ $ Windows
System Cleanup Multiple languages File Recovery Software Uninstallers ... Registry Cleaner Add a feature

112 Like
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Advanced SystemCare

Advanced SystemCare, all-in-one PC optimization utility, specializes in ONE-Click solutions to detect, clean, repair, speed up and eventually protect PC. This...
- Bundleware
  The installer contains adwares. Be careful during the installation: https://alternativeto.net/discussions/applications/11718/be-careful-in-the-installation/
Freemium Windows
System Cleanup Multiple languages Privacy focused Security focused ... Registry Cleaner Add a feature

105 Like
Tweaking.com - Windows Repair

Tweaking.com - Windows Repair is a tool designed help fix a large majority of known Windows problems including; registry errors, file permissions, issues with Internet...

Freemium $ $ $ Windows
Windows repair Portable Registry repairing Sits in the System Tray Add a feature

26 Like