Baptiste Daroussin did an incredible job on FreeBSD with the new packages system, named PkgNG. It brings modern workflow, options and shiny features that were needed for a long time.
Configuration management tools are awesome. Using them, you are now managing loads of servers, reaching the pub on time and you can focus on really fun stuff.
Mcollective has been able to fire up puppetd runs for a while now, via a standalone RPC call or through the puppet commander binary (check it out, spread your load).