> For the complete documentation index, see [llms.txt](https://docs.zongsoft.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zongsoft.com/documentation/en/framework/externals/projects.md).

# Browse by Project

Find extension packages, configuration entry points, and topic guides by their externals source projects.

If you know the project name or are ready to deploy a package, go directly to its project page. [Extension Plugins](/documentation/en/framework/externals.md) organizes the same capabilities by need: caching, scripting, scheduling, spreadsheets, cloud services, and device integration. Each project page collects an implementation’s deployment requirements and limitations and links to its full usage guide.

## Project Index

The following includes 14 external extension projects; Web, Gateway, and optional storage artifacts in the same directory are classified in the corresponding projects.

| Project                                                                              | Main Capabilities                                                                                                                                                                                        | Related Topic                                                                                 |
| ------------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------- |
| [Aliyun (aliyun)](/documentation/en/framework/externals/projects/aliyun.md)          | Integration of Alibaba Cloud OSS, messaging, SMS and voice, mobile push and other capabilities                                                                                                           | [Cloud Services and Callbacks](/documentation/en/framework/externals/cloud.md)                |
| [Amazon (amazon)](/documentation/en/framework/externals/projects/amazon.md)          | Integrate Amazon S3 and compatible object storage through the framework file system                                                                                                                      | [Cloud Services and Callbacks](/documentation/en/framework/externals/cloud.md)                |
| [ClosedXml (closedxml)](/documentation/en/framework/externals/projects/closedxml.md) | Connect business models to Excel archiving, extraction, and template services; useful for exporting records or importing completed forms                                                                 | [Spreadsheet and Template Extensions](/documentation/en/framework/externals/documents.md)     |
| [Etcd (etcd)](/documentation/en/framework/externals/projects/etcd.md)                | Provides basic key-value operations, sequence numbers and lease lock, suitable for scenarios that require atomic sequence number allocation or coordinated access to shared resources.                   | [Caching and Distributed Coordination](/documentation/en/framework/externals/caching.md)      |
| [Garnet (garnet)](/documentation/en/framework/externals/projects/garnet.md)          | Run the Garnet server that supports the Redis protocol through the host [worker](https://github.com/Zongsoft/framework/blob/main/Zongsoft.Core/src/Components/IWorker.cs)                                | [Caching and Distributed Coordination](/documentation/en/framework/externals/caching.md)      |
| [Hangfire (hangfire)](/documentation/en/framework/externals/projects/hangfire.md)    | Connect persistent background jobs with framework scheduling contracts, suitable for delayed execution and periodic tasks                                                                                | [Task Scheduling and Resilient Execution](/documentation/en/framework/externals/execution.md) |
| [Lua (lua)](/documentation/en/framework/externals/projects/lua.md)                   | Lua expression evaluation via NLua and KeraLua                                                                                                                                                           | [Scripts and Expressions](/documentation/en/framework/externals/scripting.md)                 |
| [Opc (opc)](/documentation/en/framework/externals/projects/opc.md)                   | Provides OPC UA client, server and read-write subscription adaptation for connecting industrial data services                                                                                            | [OPC UA Device Protocol](/documentation/en/framework/externals/integration.md)                |
| [OpenXml (openxml)](/documentation/en/framework/externals/projects/openxml.md)       | Provides explicit workbook and cell operations, suitable for programs that need to directly control the spreadsheet structure                                                                            | [Spreadsheet and Template Extensions](/documentation/en/framework/externals/documents.md)     |
| [Polly (polly)](/documentation/en/framework/externals/projects/polly.md)             | Add retry, timeout, circuit breaking, rate limiting, and fallback to the [Core](https://github.com/Zongsoft/framework/tree/main/Zongsoft.Core) execution pipeline to handle transient operation failures | [Task Scheduling and Resilient Execution](/documentation/en/framework/externals/execution.md) |
| [Python (python)](/documentation/en/framework/externals/projects/python.md)          | Provides Python evaluation capabilities through IronPython, suitable for using languages and libraries compatible with this runtime in controlled rules                                                  | [Scripts and Expressions](/documentation/en/framework/externals/scripting.md)                 |
| [Redis (redis)](/documentation/en/framework/externals/projects/redis.md)             | Integrate Redis with caching, sequences, distributed locks, message streams, configuration, and reliable message storage                                                                                 | [Caching and Distributed Coordination](/documentation/en/framework/externals/caching.md)      |
| [Scriban (scriban)](/documentation/en/framework/externals/projects/scriban.md)       | Evaluate Scriban pure-script expressions to integrate small rules into business plugins by name and configuration                                                                                        | [Scripts and Expressions](/documentation/en/framework/externals/scripting.md)                 |
| [Wechat (wechat)](/documentation/en/framework/externals/projects/wechat.md)          | Provide WeChat accounts, public platforms, third-party platforms and payment adaptation                                                                                                                  | [Cloud Services and Callbacks](/documentation/en/framework/externals/cloud.md)                |

## Combine the Topic and Project Guides

If the task is "Export business records", start by comparing ClosedXml with OpenXml from the spreadsheet topic; if ClosedXml has been selected, check the package, service matching and spreadsheet naming from the project page, and then jump to the export/import example.

{% hint style="info" %}
💡 Source directories, primary NuGet packages, and runtime capabilities do not have a one-to-one correspondence. A project may also have independent Web/Gateway packages, or may rely on native libraries or external services; select deployment artifacts according to the actual roles listed on the project page.
{% endhint %}


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