Term Papers
The Community from Project GlassFish generates a number of useful artifacts; which one is applicable to you depends on you (or, more accuratedly, which role you are in). Here is a first cut at categorizing these...
In this case you are likely most interested in the Products and Distributions. These are releases that have gone through very strong Quality Assurance, have dedicated teams providing support, servicing, consulting, training. The GlassFish community will usually provide pretty good support but there are limits to what they can do with a really hard problem; a support organization may be able to dedicate an engineer's time to solve that problem.
Most users probably fit in this category.