Access to SDEdit site from search engines is broken. http://sdedit.sourceforge.net/ page redirects to http://sdedit.sourceforge.net/summary/index.html instead of http://sdedit.sourceforge.net/index.html
I have fixed the redirect - it has been in a broken state since one of the many Sourceforge migrations. There was an index.php in the htdocs directory which caused the wrong redirect. Before the migration, index.html was the webserver's first choice, so the broken index.php did not matter.
One might have to clean one's webbrowser's cache before the effect of the removal of index.php can be seen.