Adding rgbdslam_v2 that worked on my Ubuntu 12.04.5 with Hydro.
Note: To get it to compile, had to add this compilation flag in CMakeLists.txt:
  -march=native -mno-avx

For more details see http://answers.ros.org/question/190688/rgbdslam-v2-catkin_make-error/#196763
Adding CCNY SLAM that worked on my Ubuntu 12.04.5 with Hydro.

Had to make a modification from the CCNY repo:
1. Commented out all references to SURF in header files because it was removed
   a month ago.