I'm looking for something like a Continous Integration tool like Jenkins or Bamboo. But I don't want something that big and heavy, it shouldn't be like a server. Just an eleborated batch tool (first do this, then do this, then do this...)
If Linux: http://linci.tp23.org/ might fit the bill, it is written pretty much in bash.
Server components are
cron so that it limits running too many jobs at the same time. Designed to resolve the problem that Jenkins is too big to run on micro instances.