Somebody asked me once again via email about an air properties calculator I once wrote and whose source code I'd left in a Yahoo forum. The person mentioning that he didn't know how to compile it.
So, just in case anyone else is interested, below is a link to the compiled version.
A pretty standard and no frills app. Give it a dry bulb temp, a relative humidity, and a site elevation and it'll calculate dry bulb, wet bulb, enthalpy, etc.
Nothing fancy or pretty, but it works.