Not everyone has the exposure of the major studios, or even the platinum standard that is Criterion. There are tons of titles that are not only

Oscilloscope
They recently picked up The Exploding Girl, which stars Zoe Kazan, who I find very intriguing as an actor.

Eclipse

Milestone

Acorn/Athena
Along with BBC/Warner (with whom they're neck-and-neck), Acorn/Athena is the leading distributor of non-US TV titles, especially from the UK.

Warner Archive
I've written a full post on a handful of examples out of the bushels of great titles that The Archive has brought to disc at long, long last.

MPI
VCI
First Run Features
Blue Underground

Discs of the Year is a look back at the year in disc releases and trends, from the best to the worst.