AdHocTemplate is a template processor with simple but sufficient rules for some ad hoc tasks.

DumbDownViewer (ddv) is a recursive directory listing command with limited functionality. In some cases, you can use ddv like "tree" command (http://mama.indstate.edu/users/ice/tree/), even though these commands are not compatible: Several options of "tree" are missing in ddv, but there are some options that are available only in ddv (such as --copy-to) too.