Nixstaller is an Open Source project with the goal to create user friendly and flexible installers that work on various UNIX like systems. Some of its features are: small size overhead, large compatibility, Lua scripting and few dependencies.
dumpnet is a collection of bash scripts that allows you to backup multiple servers simultaneously. You can do incremental file system dumps with tar, dump and rsync, backup databases and much more. AIDE can also easily be integrated.