Rockware's Rockworks is pretty standard, but not cheap. You can download a demo version, but that will of course expire. It you have only basic pedology/lithology needs, Logiteasy ( https://logiteasy.com/ ) Free Forms, eForms and Free Logs let you create one-offs online. My students have used these successfully for illustrating posters and articles. Another option is SGS Freeware http://www.geostat.com/genesis/en/download.php .