You need to have GGI 2.x installed to run the binaries.

Here is an ECC you can use to test it with: shan2_11.ecc

And lastly, what page describing an application would be complete without a screenshot?

More information directly from the README:

This is:

  eccview 2.0 for GGI beta 1 (catchy name sought) by Peter Bortas based on 
  eccview 2.000 beta 3 by Mok and Iceman of The Black Squadron.


Legal:

  This program is copyrighted but may be freely distributed on the net.
  This means it may *NOT* be distributed on any PAY site or CDROM without
  Mok's special permission. If you'll find this program in such place,
  let him know!


About eccview:
  
  eccview plays animations in the ECC format. This format is so far as
  I know only used in old Japanese RPG and dating games. The most
  common animation will depict a cute girl looking at you admiringly
  and blinking her eyes. A word of warning for the sensitive persons
  out there: ECC is short for Ecchi, which is a Japanese word usually
  translated to "pervert". So it will probably come as no surprise to
  you that clothes on the girls in question are simply not there in
  some of the animations...


Why:

  ECCs are hardly in circulation any more, so why would I take the
  code out of storage and dust it off? Well, I once got the source for
  eccview from Mok years ago when I was thinking about doing a Solaris
  version of the viewer. I did make an Xlib version for Solaris Sparc,
  but it was never released. When I recently needed something to test 
  GGI memory targets on I came to think of eccview, so I quickly
  ported it over. It worked, and worked better* than the old X11
  version. So I decided to release it in case anyone would want it.

  * Cudos to the GGI guys for that. GGI is very easy to program for.


Source?:

  When I was given the source I promised not to release it or a
  specification of the ECC format, and I intend to stick to my
  word. It's unfortunate, but there is nothing to do about it. 

  If you can't run the provided binaries on your favorite OS, tell me
  about it and I'll consider getting hold of a machine of that kind
  and make an extra binary. No promises though.


Usage:
  eccview <eccfiles>

  q           : Quit the program
 <Space>      : Next section in the animation or the next animation 
                if the last section has been reached.

These only apply if eccview is unable to open a view area. This will
never happen when you are running it on an X-target:

 <Up>         : Scroll up.
 <Down>       : Scroll down.
 <Left>       : Scroll left.
 <Right>      : Scroll right.
 <Page Up>    : Scroll upwards the height of the view area.
 <Page Down>  : Scroll downwards the height of the view area.
 <Home>       : Scroll left the width of the view area.
 <End>        : Scroll right the width of the view area.


Resources:
  There is a GTK+ version of eccview for Linux available at
  http://www.geocities.com/SiliconValley/Platform/4014/ made by 
  LongJohns Silver / RRR

  The GTK+ version has a few problems with colors, but is othervise
  pretty much equivalent with the GGI version if you are running under
  X11.

  My apologies to Mr Silver for blatantly stealing some parts of his
  readme for this readme.


Bugs:
  Some corrupt ECCs cause eccview to segfault. This is the same for all
  versions of eccview. I have no planes to fix it.

  Some section changes causes eccview to show the wrong palette for a
  short period of time.


Contact:
  For this GGI version, email: 
 
  Peter Bortas <peter@bortas.org>

  Once upon a time, the original authors had the following
  addresses, but it is likely that they have "got life" and are
  not interested in things like this anymore, so you probably
  shouldn't bother them.
 
  Mok <mokmok@usa.net>
  Iceman <prevotea@artifis.u-strasbg.fr>