diff [-ru] file1 file2

expr [expression]

id [-ruGgn] username

printf format [argument...]

test [expression...]

tr:
	support for character classes [:alnum:]

unexpand [-a] [-t N] [file...]

od/hd

uuencode, uudecode:
	missing options for base64

sed

patch

ed

awk

bc/dc

fmt

install

find (bare minimum)