I had installed QGIS 2.14.0 (or .1 not sure) and I did some work with the GRASS plugin a couple of months ago, so it was there.
I upgraded a couple of weeks ago to QGIS 2.14.3 and I was planning in using the GRASS plugin is now missing.
GRASS is installed and works from the Processing tools, but the plugin is not to be found anywhere... (and yes the I have installed the plugin with sudo apt-get install qgis-plugin-grass)
I have been looking for a solution and none of the ones I found seem to work. The closest one was this one but none the answers changed the situation.
(System: GRASS70, QGIS 2.14.3 Essen in Ubuntu 14.04)
Update: I found out that the grass-plugins that I have in my machine are "libgrassplugin6.so, libgrassprovider6.so and libgrassrasterprovider6.so". So the problem seems to be that I have GRASS 7 installed but the plugin is for GRASS 6, right?
Update2: I found this question in the users list (sorry I did not look earlier) and seems to be the same/similar problem... from the answers there you don't quite find the solution but I am working on it...