Random Stuff:
rEzO1hfWEsMCjAD7vQqZhbWwBd4sUTBL

Easy to read:
824U4RXH10YRUY05E221TPK42M11110X

Passwords:
cje9sE'IY]vDC>mM2<:H%V@Rp_Urz.l-

URL-safe:
novc~HzMccDU-nkTui~GciulsHh7SGQE

Lower-case:
hlaoemhoomzcmmepizkfcxqqffloeenr