"The unique Mac OS X cloud and external drives backup app
Solid file-by-file backup utility. Make an exact clone of your disk in full or back up specified documents (or folders) only. Keep all your data safe off site (on remote servers) and on site (on external drives)."
"Duplicati is a backup client that securely stores encrypted, incremental, compressed backups on cloud storage services and remote file servers. It works with Amazon S3, Windows Live SkyDrive, Google Drive (Google Docs), Rackspace Cloud Files or WebDAV, SSH, FTP (and many more). Duplicati is open source and free.
Duplicati has built-in AES-256 encryption and backups can be signed using GNU Privacy Guard. A built-in scheduler makes sure that backups are always up-to-date. Last but not least, Duplicati provides various options and tweaks like filters, deletion rules, transfer and bandwidth options to run backups for specific purposes."
Tools for packaging OS X installers
This tool allows you to create an installer package from an "Install OS X.app" or an InstallESD.dmg. You can use this package to install OS X on an empty partition, but perhaps more interestingly, you can also use it to upgrade existing OS X installations to a newer version of the OS X. There are many tools and workflows that support the installation of Apple packages; you can use these together with an OS X installation package to upgrade machines to the latest version of OS X.
This is especially interesting when used with tools like Munki -- you can automate the upgrade of a group of machines while still preserving user data, or offer an upgrade as a "Self-Service"-type option where a user can initiate an OS X upgrade themselves without needing to have administrative rights.