Building games for mobile is now easier than ever, but with the closed iOS ecosystem, testing on a device seems pretty hard compared to the simple Android APK’s system. Thankfully, building and testing games in iOS is close to trivial if you know what you are doing.
Trello has become one of the most used tools when developing and planning games or similar content, and with this implementation you will be able to use it in conjunction with your Unity projects to maximize your productivity and organization.
Steam has released the Beta of Steam Audio with C and Unity integrations. If used correctly can perform a lot better than the current Unity 3D audio system, even if your game is not meant to be played in VR. Steam Audio can be implemented in less than 5 minutes on a current Unity project and the performance impact is minimum.