Download of LinPDF 1.4 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free software for Mac is hsGame studio. 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. The software lies within Productivity Tools, more precisely Office Tools.
From the developer:
LinPDF is a simple PDF editor that lets you split and merge documents with ease. Also, it allows you to annotate and read PDF files easily. Thus, you can add highlight, strikeout, and underline to PDF. Also, you can add various shapes, text, stamps, watermarks and pictures to PDF. You can create various styles of signatures and add them to PDF files. The tool supports encrypted PDF files and allows you to set operation permissions.
You may want to check out more Mac applications, such as pdf-DocPro or shadowClipboard 3, which might be related to LinPDF.