Open Snapt is a place where we can share some of our code, tools and tips for free. Everything here is BSD licensed, and you are free to do with it as you wish.
We do like to hear feedback, so feel free to tweet us if you are using it (or improving it) on twitter.
We've just started it, and so it's still growing but check back for more!
(php) nbtscan is a well known program, but is a binary and must be installed on systems. Our implementation is more basic, but allows you to query the nbt name of a Windows system purely with PHP.
(php) A very simple function that we use quite often - switch between a CIDR and netmask (and back again) easily.
Snapt develop top quality UIs and virtual appliances for leading open source software solutions.