The program lies within Internet & Network Tools, more precisely General. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
Lemon is a FileDownloader (HTTP) for Mac. Features include: Link Analyzer (processing of download links from HTML source,Text, etc... File Downloader (HTTP download manager) URL Generator (URL generation with the continuity number) URL Editor File Renamer
You may want to check out more software for Mac, such as Bally Lemon Jump, Tencent Lemon Lite or Airport Mania: First Flight, which might be similar to Lemon.
Device Assistants
Document management