Navit for WebOS - free turn by turn
Navit is a 3rd party, open source, stand alone GPS app with turn-by-turn navigation. It uses the OpenStreetMap (OSM) data sources, which include Europe. Matter of fact, it's irritatingly european for us 'Mericans because there's no non-metric option.
It's a homebrew app, available from www.webos-internals.org for free.
First time homebrew users will need to download the desktop app "WebOS Quick Install" from the same site, and then install PreWare. PreWare is an over-the-air installer, aka the "homebrew app catalog" app for your WebOS device. Once you have PreWare on your phone you will not need to connect your device to a PC to install apps again (barring a major software update that requires a new version of PreWare)
All the apps, patches, services, and tools on PreWare are free. There are some ~1,000 app and another 400 patches that tweak the behavior of WebOS.
Oh and if you're miffed that it's homebrew, that's because the spoken directions require a software service that can hijack the audio feed. That's not in any of the existing WebOS 1.4.5 APIs so it can't go in the official app catalog. WebOS 2 or 3 may change that.