SmartSMS 

SmartSMS enables you to send Picture Messages, Caller Group Graphic, Operator Logos, Ringtones, EMS messages and FlashSMS direct from your PC to a GSM phone. Send using modem or Phone (connected through cable/IR/bluetooth) or Internet.
ringtones smartsms ring tones sms gsm nokia ring siemens ericsson motorola gsmsoft ems logos

Polyphonic ringtones 

send unlimited free ringtones, polyphonic tones, and operator logos to mobile phone UK. No signup or login required, create your own ring tones and mobile logos.
polyphonic mobile midi ringtones ring sounds ring tones gsm