This used to be primarily about goldsmithing, but I'm branching out ^_^
So here's a top-level table of contents, for what might be of interest to you:
koolaid linkshell has a good goldsmith guide as well, but only to level 36
Detailed info on theories of HQ Synths. Moon phase, day, and skill level covered.
Non-crafting info: Really really good guide on
Races and Jobs, with starting stats, as long as other general FAQ type stuff.
Another site has separate
jobs and
races pages
Weapon skill cap charts, and proficiencies
PS: If you're on Odin server, how about sending Filip some free gold beastcoins? ^_^
How I cleaned my non-functional PS2 DVD drive