The LibreOffice project has a preliminary logo.
The symbol aside, I see some issues with the type. The combination of the top of the 2nd f and the dot of the i is a little unfortunate. The b and r might work for body text, but not here. Setting Libre in bold only emphasises the unfortunate proportion of the 2 words (close to, but not quite the same width).
I don’t get the The Document Foundation tag-line.