lacheck - 1.26-17 main

LaCheck is a simple syntax checker for LaTex that is based on a
single-pass lexical scanner. This makes clear that there are a lot of
LaTeX problems this program cannot find, although it will find most
simple mistakes. Complex macro packages may, however, make it completely
unusable.
.
This program was bundled with AUCTeX once upon a time and is best known
from there.