+
+# gdb, GNU debugger.
+if installed gdb; then
+ link gdb/gdbinit ~/.gdbinit
+fi
+
+# ghc(i), Glasgow Haskell Compilation.
+if installed ghci; then
+ link ghc ~/.ghc
+ link ghc/ghci ~/.ghci
+fi
+
+# Powerful FTP client.
+if installed lftp; then
+ link lftp ~/.lftp
+fi
+
+# Maxima, a symbolic algebra program.
+if installed maxima; then
+ link maxima ~/.maxima
+fi
+
+if installed psql; then
+ generate psql/psqlrc .in simple_cpp \
+ HISTFILE_PATH -- "`pwd`/psql/history"
+ sed_i 's/^#/--/' psql/psqlrc
+ link psql/psqlrc ~/.psqlrc
+fi
+
+# MySQL client.
+if installed mysql; then
+ link mysql/my.cnf ~/.my.cnf
+fi
+
+if installed sqlite3; then
+ # sqlite3 doesn't support any comments in sqliterc.
+ grep -v -E '^#' sqlite/sqliterc.in >sqlite/sqliterc
+ link sqlite/sqliterc ~/.sqliterc
+fi
+
+# perlcritic to check Perl programs for common problems.
+if installed perlcritic; then
+ link perl/perlcriticrc ~/.perlcriticrc
+fi