I'm not going to tell you why you may want to install a custom recovery. You already know you need one to replace your default ROM or make carbon copies of your device's current state. And you know that the Team Win Recovery Project's custom recovery is at the top of your list of options.
Now TWRP has arrived for quite a few devices, including a buttload of Xiaomi phones. We're talking about the Mi 2 and Mi 4, along with their various versions. There's the Redmi 3, Redmi Note 2, and even the Mi Pad. These make the list not long after the Redmi Note 3 did the same.
Xiaomi is hardly the only manufacturer whose products are feeling the love. There's the IUNI U3, Oppo R7sf, Lenovo ZUK Z1, and the CDMA version of Samsung's Galaxy Core Prime. The Moto E LTE, which already had downloads available, now has a device page.
Hit up any of the links in the boxes to download TWRP for the relevant device.