How can I list the files in a zip archive without decompressing it?

The less utility is capable of peeking into a zip archive.

Less comes bundled with Unix and there is no need to install als. The output is scrollable (paged) and does not log things to the terminal (unlike unzip -l mentioned in the other answer).

As per https://superuser.com/a/216675/249975,

So simply use less filename.zip

Use unzip with -l option:

unzip -l file.zip