Cyanogen

CyanogenMod is an alternative Android OS distribution

Advantages

• Built from Android sources : spyware free, NSAware free, ...
• Rooted
• Community maintenance for discontinued phones (eg old HTC Hero)
• Network-friendly options (eg Tethering with SFR, Connection with WiFi Adhoc, ...)
• ...

Drawbacks

• Unsupported cameras
• Intempestive crashs
• ...