rpTags supports standard genders and a number of non-binary genders as well.
You can configure the tooltips to whatever you want. In this case, they're showing Oraibi's 5th "at first glance" when you mouseover the 5th icon slot.
The help system is cross-referenced and gives useful examples.
In this screenshot, you can see various rpTags on display in nameplates via ElvUI.
Starting with 9.0.x, rpTags uses a modular design that means only necessary modules are loaded.
As of rpTags 9.0.5.2
rpTags has over 300 rp;tags you can use, all of which are documented in the online help.
Previews of panels and tooltips take a lot of the guesswork out of writing tags.
rpTags can be configured to automatically translate between centimeters and inches.
As of 9.0.5.2
rpTags includes copy-and-paste'able "recipes" of tags for common uses.
The tag editor makes it a snap to add new tags to a panel in rpUnitFrames.