I saw that Alexey Danchenkov (a colleague of you?) has added a link to spviewer to the CouchDB Wiki at https://wiki.apache.org/couchdb/CouchDB_tools
. First of all it is highly appreciated to add helpful software there. Thank you.
When visiting the website I recognised, that one has to register to be able to download the viewer. I don't think this is cool and think that the viewer should be downloadable without registering. This is the well known behaviour in the OpenSource community. You could add for example a direkt link without registration.
Another point is, that the buttons under the form are smashed (latest Chrome on Mac OS X). See the attached screenshot.
I would be happy if you let us know about the idea to ask people for a registration.