I use something called Free RAR Extract Frog. I have also used 7-Zip in the past.
Just be careful if downloading and installing, as many freeware program installers bundle in other insidious crapware that you can avoid, BUT you MUST read the screens during installation, looking not only for pre-checked boxes where you are authorizing something like Spigot, but they also sometimes have a EULA (end user license agreement) that most folks just automatically click Next for - but in these bundled installers they sometimes show a EULA screen that is actually for some completely other Spigot-like piece of malware. They get away with these kinds of things because if they pre-check it and you blindly just click Next, you are technically agreeing to the installs, so while they are PUPs (Potentiall Unwanted Programs), they are neither viruses or malware.
It was a lot of typing above, but I am just trying to say that whatever you choose to download and install - just be careful to pay complete attention to what is presented to you for authorization during the installation process. :)
Bob Bone