> For the complete documentation index, see [llms.txt](https://lfdocs.lookingglassfactory.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lfdocs.lookingglassfactory.com/legacy/legacy-software/index.md).

# Looking Glass Core Overview

(last updated July 2024)

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**Note:** Looking Glass Core is no longer being actively developed. Please instead see [Looking Glass Bridge SDK](/software/looking-glass-bridge-sdk.md) which supports all of the same features and more. 

Looking Glass Core (previously HoloPlay Core) apps will continue to work with Looking Glass displays sold prior to 2024.
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HoloPlay Core unlocks the ability to integrate your existing 3D software with Looking Glass displays, making the Looking Glass a holographic second monitor.

HoloPlay Core comes in two different flavors:

{% content-ref url="/pages/-MWj9-1h-e93R6Er2xmX" %}
[Looking Glass Core SDK](/legacy/legacy-software/core-sdk.md)
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* Native dynamic libraries for Windows, Mac, and Linux

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[Looking Glass Core JS](/legacy/legacy-software/corejs.md)
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* JavaScript for web or Node development 

Check out how **Schrödinger** used the HoloPlay Core SDK to improve their workflow.

![schrodinger\_1](/files/-MWj9C9TQYxwBz9jojDa)

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The Looking Glass Core SDK is currently in closed beta. To apply, [click here](https://look.glass/holoplay-core).
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Email us at <developer@lookingglassfactory.com> if you have any further questions about how you can integrate HoloPlay Core into your software