Here are some places where you can look for information about SLEP: Sparse Learning with Efficient Projections:

Trackers
  1. Bugs: Bug Tracking System
  2. Support: Tech Support Tracking System
  3. Patches: Patch Tracking System
  4. Feature Requests: Feature Request Tracking System
Wiki
SLEP: Sparse Learning with Efficient Projections has a wiki that can be found here.