Latin Modern Mono

GUST e-foundry License v1.00

This license can also be found at this permalink: https://www.fontsquirrel.com/license/Latin-Modern-Mono

This is a preliminary version (2006-09-30), barring acceptance from
the LaTeX Project Team and other feedback, of the GUST Font License.
(GUST is the Polish TeX Users Group, http://www.gust.org.pl)

For the most recent version of this license see
http://www.gust.org.pl/fonts/licenses/GUST-FONT-LICENSE.txt
or
http://tug.org/fonts/licenses/GUST-FONT-LICENSE.txt

This work may be distributed and/or modified under the conditions
of the LaTeX Project Public License, either version 1.3c of this
license or (at your option) any later version.

Please also observe the following clause:
1) it is requested, but not legally required, that derived works be
  distributed only after changing the names of the fonts comprising this
  work and given in an accompanying “manifest”, and that the
  files comprising the Work, as listed in the manifest, also be given
  new names. Any exceptions to this request are also given in the
  manifest.
 
  We recommend the manifest be given in a separate file named
  MANIFEST-

Webfont Kit

This font's license appears to allow you to use @font-face css embedding!