Avira AntiRootkit Protection recognizes active rootkits. However, there are rootkits, which are used legally in programs. Avira AntiRootkit Protection also detects those. Please note that using reported rootkits is at your own risk and it can cause program errors.
With Avira AntiRootkit Tool you'll be able to view all the rootkits that are active on your system.
Malwarebytes Anti-Rootkit is a handy and reliable application designed to scan, detect and clean malicious rootkits that reside on your computer. For complete internet protection, download Malwarebytes here.
GMER is an application that detects rootkits and allows you to monitor system functions including drivers loading, libraries loading, file functions, registry entries, TCP/IP connections and more.