> I've never know a search engine that asked for permission. :)

They don't, but I meant asking out of courtesy. It's probably not an
issue though. The average Scheme codebase is very clean so it's probably
not embarrassing to index anything :)

> Have asked Amirouche if he still has the list of sites he was indexing.

This is his list (or was at one point):

http://community.schemewiki.org/
http://dynamo.iro.umontreal.ca/
http://git.savannah.gnu.org/cgit/guile.git/tree/
http://git.savannah.gnu.org/cgit/guix.git/tree/
http://ikarus-scheme.org/
http://justinethier.github.io/cyclone/
http://larcenists.org/
http://lists.gnu.org/archive/html/bug-guile/
http://lists.nongnu.org/archive/html/chicken-announce/
http://lists.nongnu.org/archive/html/chicken-hackers/
http://lists.nongnu.org/archive/html/chicken-users/
http://r7rs.org/
http://sarabander.github.io/sicp/
http://sph.mn/
http://synthcode.com/scheme/chibi/
http://www.littlewingpinball.com/doc/en/ypsilon/
http://www.r6rs.org/
http://www.s48.org/
http://www.scheme-reports.org/
http://www.scheme.dk/planet/
https://api.call-cc.org/4/doc/
https://bitbucket.org/cowan/r7rs-wg1-infra/
https://bugs.call-cc.org/
https://call-cc.org/
https://cisco.github.io/ChezScheme/
https://cons.io/
https://docs.racket-lang.org/
https://ecraven.github.io/r7rs-benchmarks/
https://ecraven.github.io/r7rs-coverage/
https://eggs.call-cc.org/
https://github.com/cisco/ChezScheme/
https://github.com/gwatt/chez-exe
https://github.com/leftmike/foment
https://github.com/leppie/IronScheme
https://github.com/scheme-live/library.readscheme.org
https://github.com/shirok/Gauche
https://github.com/vyzo/gerbil
https://htdp.org/
https://lists.gnu.org/archive/html/guile-devel
https://lists.gnu.org/archive/html/guile-user/
https://lists.gnu.org/archive/html/guix-devel
https://lists.gnu.org/archive/html/help-guix/
https://lists.gnu.org/archive/html/mit-scheme-users/
https://lists.gnu.org/mailman/listinfo/bug-guix
https://pkgs.racket-lang.org/
https://practical-scheme.net/
https://racket-lang.org/
https://schemers.org/
https://scsh.net/
https://small.r7rs.org/
https://srfi.schemers.org/
https://wiki.call-cc.org/
https://wiki.call-cc.org/discussion-groups
https://www-sop.inria.fr/mimosa/fp/Bigloo/
https://www.gnu.org/software/guile
https://www.gnu.org/software/guix
https://www.gnu.org/software/kawa/Community.html
https://www.gnu.org/software/kawa/Features.html
https://www.gnu.org/software/kawa/Installation.html
https://www.gnu.org/software/kawa/Overall-Index.html
https://www.gnu.org/software/kawa/ToC.html
https://www.gnu.org/software/kawa/index.html
https://www.gnu.org/software/kawa/news.html
https://www.gnu.org/software/kawa/pt01.html
https://www.gnu.org/software/kawa/tutorial/index.html
https://www.gnu.org/software/mit-scheme/
https://www.scheme.com/