A simple preprocessor that can recursively include the contents of multiple files into an output stream. (Think of it like "m4 lite.")
echo -n "foo" > name.txt
cat << EOF | ./incl
Hello #incl(name.txt), how are you?
This is a template, #incl(name.txt).
EOF
Because of make's default suffix rules, build simply with:
make incl
Optionally copy the binary to your path.