Thanks for the heads up fragsta. Before deciding to do this, we at CoC looked around for any sort of artillery addon that met the following criteria:
A) It fires its own shells and out of the barrel (or for rockets, after boost stage), they travel ballistically to their target, up to the weapon system's maximum range (for the unboosted 155mm projectile this is 18km; for the M26 rocket fired by the MLRS, that's 32km). Right now, when you're hit by a M109 HE shell, you get deathcam straight back to the firing unit.
B) Its fire is accurate at any difference between firing height (ASL) and target height.
C) It includes a control interface that allows the FO to plot shots in something approaching a realistic manner.
D) It can do all this without any scripting by the mission designer
E) It works in MP
F) The interface is "open-ended", allowing other addons to "plug in" to the existing structure without requiring a rewrite of the base .pbo .
G) Firing units automatically group into sections or platoons according to type, and generate realistic distributions (sheaves).
H) All models and textures used are used with the full permission and cooperation of the people and teams that made them.
I for one have been playing with artillery in OFP for a year and half and haven't seen any addon that meets more than one of these criteria (usually D). That's why we set out to do this. If you click on the link "UA preview", there is an english-language page o' screenshots, with an explanation of what's happening.
Since you are compiling the master index of addons, should you know of some one of the "loads of addons" that does this, I'd be very eager to find out about it.