1. gvSIG Mini is a free viewer of many On/Offline Maps:
- OpenStreetMap
- Yahoo
- Microsoft Bing
- Google Maps
- PNOA (ES)
- Ordnance Survey (UK)
- Yandex (RU)
- etc
It also has interesting features, such as:
- WMS & WMS-C Client
- Route calculation
- Address/POI search
- Share location (twitter, SMS, e-mail, facebook, ...)
- GPS, cell & WiFi location
- WVGA
- Navigation mode
- Compass support
- Street View integration
- Layer configuration downloader
- QuickZoom: SlideBar or DoubleTap
- Android 2.1 support (now from 1.5 up to 2.1)