According to Wikipedia, Rabbi Avraham Ben Harambam wrote a commentary on the Torah. Is there anywhere I can find a copy of this online?
You can access his peirush on Bereishis and Shemos on the Otzar website here
R. Solomon David Sassoon (1915–1985) published Rabbenu Abraham's commentary on Genesis/Exodus (the only sections largely extant) from a Bodleian manuscript in 1965. It is available to download for free at HebrewBooks: