Do is an incredible free to-do ui kit including 130 screens, 10 unique themes and more than 250 elements for Adobe Photoshop and Sketch app.
Materia is an UI Kit for Android based on Google Material design and released exclusively for Freebiesbug.
A very simple invoices app concept for your inspiration. Free PSD designed and released by Monika Majkowska.
Here is a Skype app concept built with Material Design by Google. Free PSD created and released by IndiaNIC.
Here is a complete GUI pack including some Apple Watch apps concepts. Free PSD designed and released by Jan Losert and Lukáš Kus.
TETHR is an impressive and complete UI kit for iOS design. This resource is free for a limited time only! Released by Invision.
Redesigned Facebook app using Android Material Design philosophy. Free PSD created and released by Ruban Khalid.
Exclusive freebie of this week is an Android Material Design free PSD by Donart Selimi. It includes 5 screens and an some UI elements.
Here is a useful free PSD UI kit for Instagram app. Material design created and released by Zach Buechler.
Here is the profile page concept for a mobile app. Free PSD designed and released by Alexander.