Google spreadsheet summarising the results of this thread
here.
Jdegre's excellent
chipping optimiser is documented
here. It uses the percentages listed in this thread, studies on how much ESI is required for a certain amount of skill, and market prices to calculate the quickest chipping route to your chosen profession level.
D'Angelo's prostanding
thread. The original work began here.
The
chipping thread. Documents the contributions of skills on professions as calculated via chipping.
NRF. Very useful utility that can get your skill and professions level for you in-game. Acts as a screen grabber and then can read the screenshots to extract the data for you.
Vedder's
health thread. Researching which skills contribute to HP.
MG Mighty's health
thread. As above.
Gingko's Carpentry
thread.
Gingko's attributes
thread. Discussion of the contribution of attributes to professions.
Doer's Evader
thread. Discussion and research into the impact of the your Evader prostanding.
Actam's ESI
thread. Research into how much skill is required to fill a given tt ESI, and into creating a tool to calculate the best chipping route to a given milestone.
The Ranged hunting results
thread. Calculations and verification of the percentages listed in this thread for the ranged hunting professions.
jdegre's Evader
thread. Calculating the contributions of skills on the Evader profession.
steffel's attributes
thread. Research into the effect of attributes on HP.
Witte's min damage
thread. Calculating the contributions of skills on the Ranged (Dmg) professions and how that affects min damage.
pe-wiki
skill section. Detailed facts and figures regarding skills, professions and unlocks.