Can I download xcode 6 without dev account? I don't want to download iOS 8 or so, but I want to start learning Swift without paying 100$. So, is there a way to download xcode 6?
Apple won't provide freely a beta of Xcode. Only Yosemite is available for non dev-members. Xcode 6 will be free once it reached a release version. 

Though, you'll be able to find XCode on non legal downloading site...