TabTopus 4.2.5 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The program lies within Productivity Tools, more precisely Office Tools. The actual developer of this free Mac application is Mario Gajardo Tassara.
From the developer:
TabTopus is a useful and lightweight macOS App that lets you export the names and URLs of all web pages in your current Safari session. This implies that all your Safari windows and tabs will be scanned in order to extract this info. You can save the data to either a plain text file or to an HTML bookmarks document, which is a universal standard, ready for importing to another web browser or for sharing.
You may want to check out more Mac applications, such as pdf-DocPro, Simply Notes or shadowClipboard 3, which might be similar to TabTopus.