- HTCondor's standard universe: Links in a custom library that replaces system calls with wrapped versions so state can be saved; checkpoints (and restores) inside of a signal handler.
- DMTCP (Distributed MultiThreaded CheckPointing (See DmtcpCondor ): Uses ptrace(?)
- CRIU (Checkpoint/Restore In Userspace) - See also This LWN article: Some kernel changes
- BLCR (Berkeley Lab Checkpoint/Restart): requires kernal changes
- c/r (Linux Checkpoint/Restart) - No news since 2010. LWN article
- CryoPID - No news since 2005
- Checkpointing -List of others, circa 2011
- OpenVZ - Check on. May be built on CRIU
- ZAP - Circa 2008
