Title: Physics for the IB Diploma (6th Ed.)
Author: K.A. Tsokos
Publishing company: Cambridge University Press
Deep and thorough explanation of every single aspect of the syllabus. Many different questions, enabling one to test his knowledge, but also to prepare himself for the actual exams. All in all, the best IB Physics book available on the market!
Title: IB Physics Course Book 2014 Edition
Author: D. Homer & M. Bowen-Jones
Publishing company: Oxford University Press
Covers the IB Physics syllabus in a way that is easy to understand. However, it lacks in exercises and depth of explanation of some concepts.
Title: Physics (Kognity)
Author: Various
Publishing company: Kognity
A very easy to understand online material, however lacking the level of sophistication required for IB Physics. It is worth using it as a first contact with hard concepts, in order to acquire a more superficial and broad view.
Books
Websites
Title: Khan Academy
Founder: Sal Khan
Although not directly related to the IB Diploma, Khan Academy is one of the best available educational websites in the world, especially due to its excellent videos. It is recommended for students struggling to understand one specific concept, for instance, electromagnetic induction.
Title: Hyperphysics
Founder: C. R. Nave
Another website that is not designed specifically for IB Physics but covers in a very sophisticated way the whole syllabus (and more). Very useful for students wanting to expand their knowledge on this subject or seeking an interesting topic for their Internal Assessment projects.
Apps
Title: Error Propagation (for IB)
Creator: Marco Koblinsky
This app was made to help IB students while they write their lab reports, IAs and explorations. It makes the error propagation calculations easier and faster.
Others
Papers: Besides reading, solving papers is one of the most important parts to prepare for the IB Physics real exams!