binpatch is a framework for creating binary patches for OpenBSD on all platforms in a semi-automatic way. It can automatically download the source patches published on http://www.openbsd.org/errata.html, apply them, build them, and package the result into binary patches. Unlike the traditional method of patching the source tree, applying binary patches requires neither extra disk space to hold the whole source tree, compilers, nor a powerful enough CPU to build the programs patched in a reasonable amount of time.
