Don't get too excited yet, I'm a little confused about this, but TiltOS has a CUPS package for Haiku. It's relatively small (2.8 mb). I believe these are GCC4 packages. Perhaps someone from the community can clarify if this works, or includes any printer drivers. Previous efforts to port CUPS to Haiku were a bounty here, a GSOC project, and two projects at OSDrawer here and here.

Also of interest are Bonnie++, Boost, and Cairo. See the repository here. Instructions on how to setup Box (the package management program) here.