helios(1) on Linux
The text 060cc51bba68, as Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.
attraction/repulsion particle effects and some smooth surfaces.
Flags it lists
-
--attracters -
--blur -
--cameraspeed -
--emitters -
--ions -
--maxfps -
--nice -
--root -
--size -
--speed -
--surface -
--wireframe