Add theme.park to External links (#3641)

README.md

@@ -176,7 +176,7 @@ _Related: [Internet of Things (IoT)](#internet-of-things-iot)_
 
 - [Accelerated Text](https://github.com/accelerated-text/accelerated-text) - Automatically generate multiple natural language descriptions of your data varying in wording and structure. ([Source Code](https://github.com/accelerated-text/accelerated-text)) `Apache-2.0` `Java`
 - [Actionsflow](https://actionsflow.github.io/docs/) `⚠` - The free Zapier/IFTTT alternative for developers to automate your workflows based on Github actions. ([Source Code](https://github.com/actionsflow/actionsflow)) `MIT` `Docker/Nodejs`
-- [Activepieces](https://www.activepieces.com) - No-code business automation tool like Zapier or Tray. For example, you can send a Slack notification for each new Trello card. ([Demo](https://demo.activepieces.com), [Source Code](https://www.github.com/activepieces/activepieces)) `MIT` `Typescript`
+- [Activepieces](https://www.activepieces.com) - No-code business automation tool like Zapier or Tray. For example, you can send a Slack notification for each new Trello card. ([Source Code](https://www.github.com/activepieces/activepieces)) `MIT` `Typescript`
 - [ActiveWorkflow](https://github.com/automaticmode/active_workflow) - An intelligent process and workflow automation platform based on software agents. `MIT` `Ruby`
 - [AmIUnique](https://amiunique.org/) - Learn how identifiable you are on the Internet (browser fingerprinting tool). ([Source Code](https://github.com/DIVERSIFY-project/amiunique)) `MIT` `Java`
 - [Automatisch](https://automatisch.io) - Business automation tool that lets you connect different services like Twitter, Slack, and more to automate your business processes (Open source Zapier alternative). ([Source Code](https://github.com/automatisch/automatisch)) `AGPL-3.0` `Docker`
@@ -2036,6 +2036,7 @@ Before hosting one, please see [shortcomings](https://en.wikipedia.org/wiki/URL_
 - [Blink](https://docs.blink.rest) - Easy-to-host, SSO-integrated, CDN-powered link shortener (+decoupled analytics) for teams. ([Source Code](https://github.com/JaneJeon/blink)) `AGPL-3.0` `Nodejs`
 - [Easyshortener](https://github.com/easypanel-community/easyshortener) - A simple URL shortener. `MIT` `PHP/Nodejs/Docker`
 - [goshorly](https://gitea.hackmi.ch/Phil/goshorly) - An easy self-hosted Link shortener in Golang. `MIT` `Go`
+- [Just Short It!](https://github.com/miawinter98/just-short-it) - A KISS, single-user URL shortener that runs in just one container. `MIT` `Docker`
 - [Kutt](https://kutt.it) - A modern URL shortener with support for custom domains. ([Source Code](https://github.com/thedevs-network/kutt)) `MIT` `Nodejs`
 - [liteshort](https://git.ikl.sh/132ikl/liteshort) - User-friendly, actually lightweight, and configurable URL shortener. `MIT` `Python`
 - [Lstu](https://github.com/ldidry/lstu) - Lightweight URL shortener. `WTFPL` `Perl`
@@ -2178,6 +2179,7 @@ _See also: [Wikimatrix](https://www.wikimatrix.org/), [Wiki Engines - WikiIndex]
 - Dynamic Domain Name services: [Afraid.org](https://freedns.afraid.org/domain/registry/), [Pagekite](https://pagekite.net/)
 - Communities/forums: [/r/selfhosted](https://www.reddit.com/r/selfhosted/), [IndieWeb](https://indieweb.org/)
 - Mirrors: [GitHub.com](https://github.com/awesome-selfhosted/awesome-selfhosted), [Gitlab.com](https://gitlab.com/awesome-selfhosted/awesome-selfhosted)
+- [theme.park](https://theme-park.dev/) - A collection of themes/skins for 50 selfhosted apps! ([Source Code](https://github.com/GilbN/theme.park/)) `MIT` `CSS`
 - [Track Awesome Selfhosted](https://www.trackawesomelist.com/awesome-selfhosted/awesome-selfhosted/) - Get the latest updates of awesome-selfhosted.
 
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