Works in 3.9.1

Here are my + and -.

+ Nice looking, simple.
+ Fast responsive with ajax.
+ Nice code that I can understand to modify so it works best for me.
+ Flexible size for bottom or side-widgets.

– French UI for settings, but there really not much to set. Only one “channel” seems to work. I do not know if you need to give it a name. If you do it will not be seen in the administration panel.
– Many calls to the server. After a call it sleeps for 500ms, then updates again. I changed that in the javascript file on my server (telder.com) so it will be longer between the calls if noone chats.
– Not possible to add more smileys without altering the php code and naming of your smileys.
– Only a few messages shown at start (I do not yet know how to change that)
– No timestamp visible, but saved in the database. (would be great to see while hovering over a message)
– No option to let only logged in persons chat. Perhaps just me wanting that. ?? (I made it myself by just removing the input for others)

I like it alot.