Formerly called the Ammonius Organization, the Marc Sanders Foundation has sponsored younger scholars prizes for the last several years. They have a new website here.
The biggest change is there are two new prizes available, one in Philosophy of Mind and one in Epistemology, to supplement those in Metaphysics and Philosophy of Religion that have been in place for several years.
A further point to note is that “younger’ has now been expanded to 15 years post-PhD, from the previous 10-year limit.
I hope all will do their best to make sure that these prizes are brought to the attention of eligible philosophers.