1. Unity.
Unity is famous for game development, however, this helps you build a VR solution for many other sectors too. E.g., you can make VR solutions for automotive, transportation, manufacturing, media & entertainment, engineering, construction, etc. With unity.
Unity offers a portal to study its products where VR developers can access courses such as "starting with unity", and more. Portal Support & Service Unity will allow you to access detailed documentation and get the help you need.
Your team can read the Unity Unity Manual Manual (2019.2) to start, moreover, you can refer to the FAQ Unity page if you have questions. See the price plan for unity.
2. Amazon Sumeria.
Amazon Sumerian is a VR engine from AWS, and you don't need a 3D graph or VR programming skills to use it. Sumeria works with all popular VR platforms such as Oculus Go, Oculus Rift, HTC Vive, HTC Vive Pro, Google Daydream, and Lenovo Mirage, moreover, it works with Android and iOS cellular devices too.
Amazon Sumeria supports various cases of use VR such as employee education, training simulation, field productivity, retail & sales, and virtual concierge. It has strong features, eg:
You can access a broad learning source that will help you use Sumeria, and you can read "start with Amazon Sumeria" for this. The Amazon Sumeria FAQ page has a lot of valuable information that is useful for every virtual reality developer. See the Amazon Sumeria page page for pricing packages.
3. Google VR for everyone
Google, technology giants offer a variety of VR development tools, and you can use it to make a deep VR experience for your stakeholders. You can access these tools on the Google VR developer portal.
You can use these tools to develop VR applications for multiple platforms, eg, unity, unreal, android, iOS, and web. To access a guide to develop VR applications for each of these platforms, the first doavigation to "select your development environment" on the Google VR developer portal.
You can then access individual guides. E.g., you can read "Quickstart for Google VR SDK for Unity with Android" if you plan to develop VR applications for Unity with Android. On the other hand, read "Quickstart for Google VR SDK for Android" if you are building VR applications for daydream and cardboard.
The Google VR developer platform has a software development kit (SDKS) for all VR platforms that are supported, eg, unity, android, iOS, etc. You can navigate to the download page on the Google VR developer portal to access it. You can read "Google VR References Fire" to understand the Google VR API and plugins that cover all SDKs offered by the Google VR development platform. You can easily develop VR software for Google Cardboard, Occulus, and most VR platforms use this.
4. Unreal Engine 4 (UE4)
Unreal Engine 4 (UE4) offers a set of strong VR development tools. With UE4, you can build a VR application that will work on various VR platforms, eg, Oculus, Sony, Samsung Gear VR, Android, iOS, Google VR, etc.
UE4 has a broad documentation, and you can access it on Unreal Engine 4. You can also study UE4 on Unreal online learning.
5. Cryengine.
Known to 3D game developers, Cryengine is a strong choice for VR software development tools. You can build a virtual reality application with it that will function with popular VR platforms such as Oculus Rift, Playstation 4, Xbox One, etc.
Cryengine offers very good documentation, moreover, you can get all the source code. Read Manual Cryengine V for more information. There is also a useful tutorial for Cryengine, and you can access it on the tutorial page on the website.
