Pixeden Excellent Free PSD Resource
Pixeden site is an excellent resource with lot of highest quality PSD files. They are very clear in their licensing which ships with files: you can use free files for personal and commercial projects, attribution is appreciated but not required.
In order to start downloading free files you will need to create free account. After creating free account just navigate to Free section and start downloading what you need. There isn't any prompts like pay with tweet or similar poor taste requirements.
Files are high quality with well naming conventions and layers organization, the only imperfection is that author does not supply any help files with instructions and explanation–he (or they) probably assumes that everyone in this World know how to use provided files.
Check out and other Absolutely Free PSD Files.