This is Weaponanza, a mod focused on bring you unique weapons without losing the FTL feel of the game. As of Sept 20th, there are 16 weapons added, and I plan on continually adding more as time goes on.

Feature Summary:
-8 NEW weapons (and counting) with custom textures
-8 improved weapons (do not replace originals)
-Plenty of new events (for the weapons, of course)
-Creeper Bombs (who doesn't want creepers?)
Downloads (See bottom of post for changelog)
FTL File:
Use Grognak's Mod Manager (http://www.ftlgame.com/forum/viewtopic.php?f=4&t=2464).
Also, there's a Xenolith page (as requested) here: http://xeno-mods.com/mod/118
New Weapons
The first half of the added weapons are completely new. Hull damaging bombs, fire missiles, ION missiles... you name it. Almost all of them also have custom designs, to keep things fresh (recolors for the most part, since I'm no spriter). These are all fairly uncommon, but you'll find all but one of them normally/in the store. See the second post for a list of new weapons.
Improved (Mark X) Weapons
The other half are improved versions of other weapons, both new and old. Note that these weapons do NOT replace the original weapons, and none of them can be bought/found normally... to keep the originals as useful as they already are. Some of them are really powerful, but overall I kept them as balanced as I could.
Other Changes
-For testing reasons, the Federation Cruiser has a Panacea attached to it. You can use this to check if the mod installed correctly.
-The Stealth Ship layout B also has a SLIGHT buff in stats.
-There are about 10 new events for the Mark X weapons. More to be added later.
-Some enemies will carry the less-powerful new weapons, to keep things a little more fair.
Changelog
v1.1
-rebalanced all new weapons (both buffs and nerfs)
-added new weapon designs for the havoc laser and the final weapon
-added .append support for the ftl file (as requested)
-fixed minor typos
To be added next update:
-A complete rework of the current events. Multiple new events for each sector type (mostly for weapons, although I'll add other results in to mix things up)
-2+ new weapons (I might be adding more Healing Burst/Panacea support bombs next... and possibly a new crystal weapon)
-Rarity modifications (for specific sectors)
-...and everything else that comes up