Atlas consists of the following projects which are hosted on SourceForge.
ACPI for Large Systems
IA64 Linux MCA recovery
Discontiguous Memory
Static Domain Partitioning
Hot Plug Memory
Linux Multiple Stepping and Frequency
ccNUMA
Hot Plug Processor
Hot Plug I/O Node
&
PCI Hot Plug for Linux
These projects are also part of a SourceForge foundry called "Linux on Large Systems". A foundry is essentially a portal of related projects.
Linux on Large Systems Foundry