Downloading FinderSync 1.0 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available.
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 actual developer of this free software for Mac is Manyetas. The software lies within System Tools, more precisely General.
From the developer:
FinderSync keeps track of the windows that are open in the Finder and 'listens' for changes in the filesystem. When a folder changes, the Finder is informed so it can immediately update the affected window(s). Although the Finder is definitely better about updating its windows than it was prior to 10.3, there are still some cases where it can use some help.