Software for text-based art?

Hi r/design! I am interested in designing a piece similar to this poster, in which a large amount of small text is organized to depict an image. Any recommendations for what software would make this easy? Thank you!

Great design resource

100 Things Every Designer Needs to Know About People (Voices That Matter) Submitted May 05, 2016 at 05:19AM by gbpow http://ift.tt/1SO95bt