MediaMonkey can sync with Apple devices, without having the files in iTunes on your PC. However you'll need iTunes installed (can also just install required iTunes components: https://www.mediamonkey.com/wiki/index. ... zation/4.0).

is it possible to program a tool that sends music to iPhone/iPod without putting the songs in iTunes?

the tool can work with "iTunes SDK" andit is not attended to go against Apple rules

the idea is to not "cache" the songs as iTunes in libraryes, just upload it directly to the iPhone/iPod from file server this help if have music library and you do o not want to have a local copy just to use it with iPhone/iPod!

is there way to achieve that?

I hope my Idea is clear, cheers