Current versions are free for all; they also offer an older version, which is available as an opensource package, for users who wish to modify the source code.
Silent install with no dialog box
InnoSetup with silent switch (progress bar visible) and responsefile
%APP%.exe /NOCANCEL /SP- /SILENT /SUPPRESSMSGBOXES /LOG="c:\temp\%app%.log" /NORESTART /LOADINF="c:\temp\%app%.inf"
"%ProgramFiles%\FeedReader30\unins000.exe" /SILENT which gives an uninstall with progress bar
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