oneSIS is a software package aimed at simplifying diskless cluster management. It is a simple and highly flexible method for deploying and managing a system image for diskless systems sufficient for serving thousands of nodes. Functional roles of nodes and node properties are easy to define, and any single node or group of nodes can easily be configured to behave independently.
Cacheonix is a reliable distributed Java cache. It helps software organizations achieve reliability, scalability, and performance in their enterprise applications by distributing cached data across a cluster of computers connected by a high-speed network and converting the per-node memory into a large cache of the shared address space. Cacheonix builds on top of a reliable cache coherence protocol that ensures that all nodes have a consistent view of the shared data.
vzhaipd (scoyo's Virtuozzo/OpenVZ HA IP Daemon) is a set of mount/umount Container scripts for Parallels Virtuozzo or OpenVZ that will make sure a HA IP is always present on one of two or more Containers. You can think of it as the poor man's VRRP for Virtuozzo and OpenVZ Containers. Use it for general service availability, software load-balancer failover, etc.