Is the Martian Rover recent enough?
Voyager was quite a while ago.
How about - NOT getting involved in the College BCS
As the poster at despair.com says - Government, if you think the problems are bad, wait until you see our solutions!
Kind of broad question but I would add the destruction of the USSR as one, without a hot war.
Someone else said the highway system, before using the funds for political inner city projects.
However, these are in the almost distant past. In the past 15 years, I cannot conceive of one good thing beyond the Bush tax cuts, which are soon to expire.
Interesting, as the government expands beyond the ennumerated powers, the worse job it does.