• DiTech (link)
• Geizhals - tech search (link)
• e Tec (link)
• Saturn (link)

Free Wi-Fi

Maps, lists:

• ongopongo (link)
• wlanmap (link)
• FreeWave (link), map (link)
• City Plan (link) also contains list of free WiFi hotspots under Bildung category.

Fixed-Line Internet

Karte eingebunden von wlanmap.com Free Wifi Hotspots .