You don't say which films you use but for slow films ISO 125 or less like Ilford Pan-F there is the Beutler developer. This developer uses only three ingredients Metol, sodium sulfite and sodium carbonate. The Metol and sulfite are in part A and the sodium carbonate in part B. For use you dilute 1:1:8. I used this developer for years with Kodak Pan-X with excellent results.