find /foo -type f -executable

-exec command ;
          Execute  command;  true  if 0 status is returned.  All following
          arguments to find are taken to be arguments to the command until
          an  argument  consisting of `;' is encountered.  The string `{}'
          is replaced by the current file name being processed  everywhere
          it occurs in the arguments to the command [...]

find ~/foo -type f -executable -exec ln -s {} ~/bar ;

for i in ~/foo/*; do [ -x "$i" ] && ln -s "$i" ~/bar; done