Some free registry cleaners are CCleaner, Wise Registry Cleaner, Jet Clean and AML Registry Cleaner. CCleaner is compatible with Windows and Mac OSX. It removes registry entries that refer to non-existing files and programs. This program offers multiple installation options including a portable version.
West Registry Clean offers several registry scan options including normal, safe and deep registry scan, and users can schedule it to run automatically daily, weekly or monthly. JetClean is available as an installed version and a portable version. It supports multiple languages including English, Spanish, Italian, Chinese and French. AML Registry Cleaner offers a registry search function that lets users search for words in the registry.