I'd probably just call them drone bombers. Because they'd have turrets.
On the same note, I've got a few more weapon concepts.
Pulse Bomb - a side application of Torpedo and Polarized Plasmatics tech, the Pulse Bomb is a small tracking globule of polarized plasma, capable of being fitted into a medium strafe mount. Due to the projectile actually weakening with range as the polarized fields dissipate around the high-energy core, its best use is in Heavy Drones. Comes in Plasma, Fusion, and Antimatter varieties, matching the researched Torpedo techs, also requires Chakkars for Plasma and Fusion, and Chakrams for Antimatter.
Gyrojets (micro missiles): With interceptor PDs available, why the heck not? Take the swarmer warhead and fit it with a simple target ID system. Now you have a small-sized short-range missile launcher, weaker hitting than a HEAP gauss and with a longer reload, but with longer range and tracking.
Non-weapon: Drone Shields tech. Once you get Shield Amplification and MkIII Shields, you can develop heavy drone frames with built-in MkI-equivalent shield generators. These drones have reduced speed and maneuverability as a result of shields drawing away engine power.
As for the other projects:
HEAP drivers seem to pass all sanity checks. Late-game they're ever so slightly weaker than comparable missiles, and aren't too easy to get (You need DF Racks and AP drivers, which some races won't get sometimes) so their higher early-game power isn't that obvious.
Repeater drivers survived transplantation into medium/large turrets admirably, now a Gauss repeater gives slightly lower DPS than its brother the medium-mount stormer, but is much more efficient at the application of this DPS. Same with the Mass Driver repeater. The gauss repeaters might look good on drones, with their high fire rate.
Flak drivers need some good blast FX, and I still can't confirm that they actually explode around incoming missiles they miss, but with a proper downgrade they work like decent medium-mount weapons. They're guaranteed to be a great swarm-deterrent, because of their wide area of effect.
Working on Swarmer Launchers and Volley Launchers next.
Here you go - if you want to use them:
http://dl.dropbox.com/u/4152380/SotSMod.zipIncludes HEAP Drivers, Repeater Drivers, and the Flak Driver. No new research necessary.
HEAP drivers require AP Drivers and DF Racks. Repeater Drivers require Stormers. Flak drivers require Stormers and Point Defence.
The archive is a Mods folder and sots.ini, which you'll have to either edit to point to your profile, or just post it as-is and hope the game understands what you want of it. The mod presumes a SotS Complete Collection, 1.8.0. If you've got something else, it may or may not work.