The VIVE Input Utility (VIU) is a toolkit for developing VR experiences in Unity, especially with the VIVE/VIVE Pro but also targeting many platforms from a common code base including Oculus Rift, Rift S Go, Quest, Google Daydream, VIVE Wave SDK (e.g. VIVE Focus standalone) and additional VR platforms as supported by Unity such as Microsoft's 'Mixed Reality' VR headsets and more.