Back around 2004 (I THINK, maybe a bit later...), just before the K-T event wiped out our ancestors, vStyler created the Windowblinds theme Prowler.
This was ported to gtk2 by JamesHardy88 and Technoshaun who both made many contributions to the over-all effect from back in prehistory, including a gno-menu theme, etc.
That was ten years ago, gno-menu is no more. But... I am stubborn. I am working to create a gtk3.22/3.24 version to be released Soon. (Soon- in whenever I can get it perfected terms...)
For now- XFWM4 Window Borders in Prowler. This is for XFCE Desktop. This is for the Window Borders ONLY, not the full desktop theme or icons.
This is modified ever so slightly for smoother lines.
Because: I never found a port for this to XFCE4 before. It's time one was made.
NOTE: If you see this for the first time, want it, but use Mint Cinnamon desktop or you use Mate Desktop, you can grab the above gnome-look link and download JamesHardy88's original with Metacity. Both of those desktops environments use the Metacity, still, so the borders will still work on your desktop.
Fix for icon text being offset on desktop on XFCE4:
In terminal, please run:
xfconf-query -c xfce4-desktop -p /desktop-icons/center-text -n -t bool -s false
Please Note: Apps menu is my own Modification of Whiskermenu and it is not included with theme. Currently, it pretty much only works on my machine because it is being held up with strings and duck tape by Python Script.
UPDATE: I have made some patches that can give an Aeznis Backdrop to ZorinMenuLite.
I have recently discovered PCMan's "gtk-nocsd" product. You can read here:
It is available in repositories and can be installed from terminal.
What This Does: It disables gtkClientSideDecoration on apps that use it, allowing the Window Manager to do so.
Given the current trend and the news that XFCE 4.16 will fully switch to CSD (Becoming like Gnome 3) and will remove XFWM4 (No more XFCE Window manager which is why many of us switched to XFCE desktop in the first place) - It is very important to let the developers know whether you disagree with this decision. (I have done so- Loudly.)
Currently, the developers do not seem to be listening. Rather, they feel they should explain to us, the users, why what they want for us (and themselves) is what we should want, too.
If you disagree with XFCE removing XFWM and replacing it with GNome 3 CSD, please use the links and Be Heard.
Extract the downloaded file into your ~/.themes folder. Select from Settings> Window Manager. Enjoy!