You could have downloaded Lowly 0.1 for Mac from our application library for free. The program lies within Productivity Tools, more precisely Office Tools. This free Mac application is a product of Daniele Catalanotto.
From the developer:
Lowly is a free-to-use application for Mac OS that allows you to convert upper case to lower case text (and vice versa). You can write the text manually or just drag and drop text files into the application. The application has an intuitive interface.
You may want to check out more Mac applications, such as Zulu's Zoo, Pirate Poppers or Light Quest, which might be related to Lowly.