This guide explains how to modify the classic theme of empathy (minimal one... the best one!) in order to have latex in empathy's chat windows. The two files PATCH_Info.plist, PATCH_Content.html are in this same gist. First of all install mathjax: sudo apt-get install libjs-mathjax libjs-mathjax-doc fonts-mathjax fonts-mathjax-extras Open /usr/share/adium/message-styles Make a copy of Classic.AdiumMessageStyle in the same folder and rename it LatexClassic.AdiumMessageStyle Open /LatexClassic.AdiumMessageStyle/Contents Modify Info.plist substituting its content with the content of PATCH_Info.plist Open /Resources Modify Content.html substituting its content with the content of PATCH_Content.html Then go to: Empathy->Preferences->Theme And Choose LatexClassic Theme Close Empathy (set it offline and close the window). Now at the restart of Empathy you will have Latex implemented in the chat, usable with  for inline math and  for displayed math.