Now, I need to process the entire text, identify each term, replace it with three variants where possible, and exclude proper nouns. Let me check each term again.

An free, open code FTP client which allows several protocols, comprising FTP, SFTP & FTP Secure. Cyberduck: An unrestricted FTP tool which enables various standards, comprising FTP, SFTP and Cloud Access. CuteFTP: An paid FTP tool which offers elaborate features, such as xfer scheduling and coding.

I need to go through each part carefully. Words like "authenticates" can be "verifies", "confirms", "validates". "Navigate" could be "move through", "explore", "traverse".

Okay, let's start by understanding what the user wants. They provided a text and asked for every term with 3 variants in a format, skipping proper nouns. The output should be text only.

So the rest are technical terms. Let's proceed step by step.

By systematically going through each part of the text and replacing each term with three variants where possible, then ensuring that proper nouns are excluded, the final output will meet the user's requirements.