There is a rather old thread in the German part that also deals with a Linux version:
Please note the part that says
"Linux version
all further requests for this feature will be ignored"
OK, that was in 2003. But perhaps this explains why there isn't one yet.
Along these lines: in the context of Linux the tag editor "puddletag" is mentioned ... perhaps that fills the gap until there is a change of mind in respect to the Linux version.