which mods. help?

Just started playing SH4 again (with UB add-on) and I was looking, in vain, for some kind of help to guide me through the plethora of no doubt fantastic mods available - posts that might provided a recommended list of mods, or even a description of what each mod does? What is the RFB mod, for example, and what does it do? Or the Mara mod? Sorry if these are stupid questions. Can anyone kindly point me to a post, or place, which might guide a newbie to the SH4 mod options? Many thanks.