For black and white someone already mentioned Ultrafine eXtreme and Arista EDU Ultra. Note that Fomapan is the same as Arista EDU Ultra. Under the Fomapan brand name the price is very slightly higher than under the Arista brand. (Foma is the name of the company that makes Arista EDU Ultra and Fomapan.)
Another contender for black and white is Kentmere, which is made by Harman, which is sort of a synonym for Ilford (kinda, sorta, roughly speaking), but Kentmere film is not quite the same as Ilford branded film, despite being made by the same company. In the US the price for Kentmere is usually quite close to the Foma films.
Which is better, Foma or Kentmere, is somewhat controversial. Ultrafine eXtreme seems to get good reviews from everyone who has used it.