cmdok checks that specified commands are OK. If command is OK than it exists in PATH and can be run.
It is a simple, small and portable Bash script. It is useful in software packages that want to check that some commands exist before trying to run them.
See wiki for more information and examples.
syspatch is a useful tool to apply OpenBSD patches to a collection of OpenBSD hosts where you don't want to have a compiler (compXX.tgz) and the src (and sys) hierarchy. You build "binary patches" on a buildhost and then deploy them using syspatch.