Motorola v3i iTunes installtion

Motorola v3i iTunes installtion

I am using Motorazr v3i since last 2 years. It very much satisfy my needs. But only one problem that I am facing is that the iTunes song copy from my PC to Phone. If I go somewhere I find it difficult to install iTunes everytime on those machines to just copy songs. Is there any software which can simple connects to my phone and copy songs without iTunes ?