1. UIWidgetTopCenterContainerFrame
   I think there are lot more "ContainerFrames" but I am not for sure whether they also have tooltip or not .
   Anyway, You can easily reproduce this one when you are in bastion
   /way 51.2, 68.8
   https://imgur.com/a/GlcdWJl
   or in HoA, after entering dungeon you can see halkias anima bar

2. infobox of PVPUIFrame
   https://imgur.com/a/Nmw5kFn

3. infobox of buildings that has ranks in GarrisonBuildingFrame.MapFrame / GarrisonBuildingFrame.BuildingList(RightSide of building window, List)
   https://imgur.com/a/zDuAbb2

4. Addon TomTom tooltip(not sure there are other than minimap tips)
   https://imgur.com/a/PJsZfFo

5. Item tooltip for EncounterJournalSuggestFrame
   Not so sure wether it's tooltip
   https://imgur.com/a/BbeGVVJ

P.S
I also found those stuffs in thorghast(higher level with blessing and curse) , Other container frames.

• BottomScenarioWidgetContainerBlock

• TopScenarioWidgetContainerBlock

• ScenarioStageBlock.WidgetContainer
  https://imgur.com/a/whGlq2Y

• ThorghastLevelPickerFrame.GridLayoutContainer
  https://imgur.com/a/zEEFr52

• EventToastManagerFrame.currentDisplayingToast.WidgetContainer
  https://imgur.com/a/MCFju8n

• EventToastManagerFrame.currentDisplayingToast.ExpandWidgetContainer
  https://imgur.com/a/MCFju8n

P.S II
You can easily reproduces these at PTR. There's NPC in oribos that teaches you legendary powers and gives you all of your followers.

• This is not tiptac styled border but, when using addon LS: toasts, tips of frames that popped up when learing legendary powers(at runeforge) are not quality bordered yet
  https://imgur.com/a/t6sFDPz

• Dunno What's this frame but when you got followers for your garrison, it's popped up window's tip
  https://imgur.com/a/zQaILOM

Hello, first time poster for this sort of thing.

I would also like to see the "Saved Instances" and "Rarity" have styling as well.

Thanks!