LiteIcon is a simple app which allows you to change your system icons quickly and easily.Discontinued
LiteIcon has been discontinued, as it is no longer possible to replace system icons on macOS Big Sur. You can still download it and use it on older macOS versions.
Brought to you by Panic and the Iconfactory, CandyBar 3 brings the best of CandyBar 2 and Pixadex 2 together into one powerful, new application. CandyBar, as always, lets you easily and safely customize your Leopard system icons like the trash can, volumes, and even the infamous...Discontinued
See note on website: "Since we’re unsure about the long-term future of changing system icons, we’re not comfortable charging money for CandyBar, and we’re also not comfortable simply making it disappear, instead we’re going to make the current CandyBar free — but unsupported."https://panic.com/blog/candybar-mountain-lion-and-beyond/
IconTweaker is a freeware application that allows you to customize all your Windows icons.Discontinued
Last version, 1.12, was released on April 2, 2007: it is still downloadable from CrystalXP.net.
WinIcon Customizer is the standard way to change all the icons on your Windows PC. WinIcon Customizer is an application that will allow users to change almost all of their Windows icons. A package of icons contains icons to replace most of the common icons on your Windows PC.Discontinued
WinIcon Customizer is not available on the official website anymore, but the version 2.6 is still downloadable from uptodown.com
IconChamp lets you change icons on macOS quickly and easily. Setting a new icon is as easy as drag, drop and apply. You can customize individual icons or create themes which let you quickly apply a set of icons all at once.This app doesn't have any features at the moment.
Icon Tool allows users to change icons for their Applications with a simple and easy to use drag-and-drop interface. Also, Icon Tool backs up the users' original icon in case the user would like to revert back their changes.This app doesn't have any features at the moment.Bundleware
The software is bundled with adware according to IKARUS anti.virus: https://www.virustotal.com/en/file/3047deede929d7ad7fcf92856a205c7dbb78e00f7fc3b4d22884a35cfd24776a/analysis/1487870858/