Licenses in use in OpenFire / Spark

Hello,

I’m interested in deploying OpenFire and Spark to use as an internal IM at my company. There is a caveat though that all open source software must use an approved license. While GPL and LGPL are fine, the “contains other licenses” part of the terms on OpenFire and Spark are a bit worrisome.

Can anyone provide me with a list of the licenses used within these products?