Adds GmailTeX plugin to gmail.  Texify your emails.  

Use plain text mode to compose your tex emails.  You can write inline latex code with dollar signs $x^2$.  For display mode which puts equations on their own line, use
$$\alpha + \beta = \gamma$$
\[ x^2 + y^2 = z^2 \]

GmailTeX script written by Valery Alexeev 
http://alexeev.org/gmailtex.html