There were several Rocket Dwarf plugins once upon a time, but the one we played in the early days of the OoH - and the one that started me on the road to RDF - was:
"Dwarf Rockets" by ig98
As I recall it consisted of a whopping 5 tags (RDF v5.1 has 1369), using the built-in green fireball of the Dwarf collection, the deer explosion, and the camera shake (which quickly became annoying).
My first "plugin" was a modification of Dwarf Rockets that converted Mortar Dwarves, Dwarf Heroes, and Archers - and most importantly removed the camera shaking.
They have longer range than RD's btw, and I've had the plugin available on the site - buried in the RDF Acknowledgements and Credits (you can download it from the link above).
I remember when I first released RDF on The Mill there was some idiot whose review consisted of something along the lines of: "OMFG this is a rip-off of the Ultra-Ninja-Rocket-Dwarf plugin made in 1962...", which was funny because (a) I had never heard of whatever the plugin was (and neither had anyone else) - and I couldn't even find it after
extensive searching for curiosity's sake; (b)
it was for TFL!!! lol!!
It was painfully obvious this guy had never even played or downloaded RDF, and after a couple of those (three total) I decided to host the downloads myself and screw having reviews (we don need no stinkin reviews...) since people couldn't seem to be objective half the time.