Just submitted * 85410: conky from server:monitoring * 85411: tolua++ from devel:languages:lua
Note that tolua++ is only needed at build time, it's kind of a swig for lua bindings, and used by conky for the imlib2 and cairo backends. It is not required at runtime at all.
Conky is a lightweight resource monitor that sits on the root of an X window. It monitors stuff such as remote servers, temperature, disk capacity, mailboxes, etc etc... It is very widely used on all distributions. (Kinda surprising it wasn't in factory)
Tolua++ is a development tool that generates glorified Lua bindings for C and C++ libraries.
Conky is stated to be licensed under the GPL on the project website, but it uses some bits from other projects and is hence a mix of GPL v3+, BSD (revised) and MIT. Tolua++ is licensed under the MIT license.
Conky is actively developed and has releases on a regular basis, although not too frequent (latest is 1.8.1 and from 2010-10-05).
Tolua++ seems barely maintained and only had few releases (it is a fork of another project though, "tolua"), last release being in Feb 2009: http://www.codenix.com/%7Etolua/ Not quite critical though, as it only generates code.