I did a google search for both "Here are examples" and "Here is examples". The former got 360,000 search results. The latter got 5,270,000 results. If nothing else, "Here are the documents" is less likely to make the reader do a double take.

As for which is technically correct, I'm unsure. Several sources[1] suggest that words like "Here" and "There" are exceptions and should not be treated as the subjects of sentences, meaning that you're deciding the subject/verb agreement by the plurality of "documents" in this case, so that "are" is correct.

[1] http://blog.oxforddictionaries.com/2012/11/subject-and-verb-agreement/

I did a google search for both "Here are examples" and "Here is examples". The former got 360,000 search results. The latter got 5,270,000 results. If nothing else, "Here are the documents" is less likely to make the reader do a double take.

As for which is technically correct, I'm unsure. Several sources suggest that words like "Here" and "There" are exceptions and should not be treated as the subjects of sentences, meaning that you're deciding the subject/verb agreement by the plurality of "documents" in this case, so that "are" is correct.