overhead slides?

[Brian May <bam@debian.org>]

Hello,

Is there any DFSG free software for producing overhead slides?

Something like seminar.sty (latex) would be ideal, but thats in
tetex-nonfree. Also, gs often produces the following fatal gs error
when viewing it with gv. :-(.

Error: /undefinedGNU Ghostscript: Unrecoverable error, exit code 1
 in BOL
Operand stack:
   (all)
Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--   --nostringval--   2   %stopped_push   --nostringval--   --nostringval--   --nostringval--   false   1   %stopped_push   1   3   %oparray_pop   .runexec2   --nostringval--   --nostringval--   --nostringval--   2   %stopped_push   --nostringval--   --nostringval--   --nostringval--   5   5   %oparray_pop
Dictionary stack:
   --dict:777/809--   --dict:0/20--   --dict:55/200--   --dict:118/300--   

(not sure what program is at fault here... I don't know much postscript.)

If nothing better exists, I will use it anyway, but just curious what
other options might exist.
-- 
Brian May <bam@debian.org>