added see also, .after

serwy · serwy · commit 26f9054db31e · 2018-11-27T22:08:31.000-06:00
diff --git a/README.md b/README.md
@@ -22,7 +22,7 @@ a [NotImplementedError][PyPyNotImplemented] is raised.
 For non-Tk calls into Tcl, Python will raise an apartment RuntimeError
 when calling a Tcl interpreter from a different thread.
 
-A common approach to avoid these errors involves setting up
+A common approach to avoid these errors involves using `.after` to set up
 [periodic polling][PollQueue] of a [message queue][PollRecipe] from
 the Tcl/Tk main loop, which can slow the responsiveness of the GUI.
 
@@ -86,6 +86,13 @@ use `root` as the master.
 
 Licensed under the Apache License, Version 2.0 (the "License")
 
+## See Also
+
+These libraries offer similar functionality, using periodic polling:
+* https://github.com/RedFantom/mtTkinter
+* https://github.com/abarnert/mttkinter
+* https://pypi.org/project/threadsafe-tkinter
+
 [PollQueue]: http://effbot.org/zone/tkinter-threads.htm
 [PollRecipe]: https://www.oreilly.com/library/view/python-cookbook/0596001673/ch09s07.html
 [WaitForMainloop]: https://github.com/python/cpython/blob/38df97a03c5102e717a110ab69bff8e5c9ebfd08/Modules/_tkinter.c#L342
