libheartbeat2 1:3.0.3-1ubuntu1 (amd64 binary) in ubuntu lucid

 heartbeat is a basic heartbeat subsystem for Linux-HA which implements
 serial, UDP, and PPP/UDP heartbeats together with IP address takeover
 including a nice resource model including resource groups.
 .
 It currently supports a very sophisticated dependency model for n-node
 clusters. It is both extremely useful and quite stable at this point in
 time.
 .
 This package contains the Heartbeat libraries to make them available
 to other programs like Pacemaker without having to install the whole
 Heartbeat suite.