Nomenclature:

A
leaf
is a check-in with no descendants in the same branch.
An
open leaf
is a leaf that does not have a "closed" tag and is thus assumed to still be in use.
A
closed leaf
has a "closed" tag and is thus assumed to be historical and no longer in active use.

All leaves, both open and closed:

2013-03-16
10:15		[d95246eada] Leaf: Make it build on dmd 2.062. (user: kinaba, tags: trunk)
2012-07-15
21:11		[fc9286dad1] Leaf: uum (user: kinaba, tags: redesign)