Add Jellyfin. (#1251)

* Update README.md

Add Jellyfin and IconChanger

* Update README.md

* Update README.md

Delete an app without download link.

README.md

@@ -706,6 +706,7 @@ Any comments, suggestions? [Let us know!](https://github.com/jaywcjlove/awesome-
 * [Hydrogen](http://hydrogen-music.org/) - Professional yet simple and intuitive pattern-based drum programming for GNU/Linux. [![Open-Source Software][OSS Icon]](https://github.com/hydrogen-music/hydrogen)
 * [ffWorks](https://www.ffworks.net/) - Comprehensive Media Tool for macOS. Making High Quality Video Encoding Accessible for Everyone.
 * [IINA](https://lhc70000.github.io/iina/) - The modern video player for macOS. Based on mpv, the powerful media player project. [![Open-Source Software][OSS Icon]](https://github.com/lhc70000/iina) ![Freeware][Freeware Icon]
+* [Jellyfin](https://github.com/jellyfin/jellyfin) - The Free Software Media System. [![Open-Source Software][OSS Icon]](https://jellyfin.org) ![Freeware][Freeware Icon]
 * [Kodi](https://kodi.tv/) - Award-winning free and open-source (GPL) software media center for playing videos, music, pictures, games, and more. [![Open-Source Software][OSS Icon]](https://github.com/xbmc/xbmc) ![Freeware][Freeware Icon]
 * [LMMS](https://lmms.io) - Formerly "Linux MultiMedia Studio", LMMS is a powerful Digital Audio Workstation designed like FL Studio (formerly Fruity Loops). [![Open-Source Software][OSS Icon]](https://github.com/lmms/lmms) ![Freeware][Freeware Icon]
 * [LosslessCut](https://github.com/mifi/lossless-cut) - Cross platform tool for quick and lossless video and audio trimming using ffmpeg. [![Open-Source Software][OSS Icon] ![Freeware][Freeware Icon]](https://github.com/mifi/lossless-cut)
@@ -1058,9 +1059,9 @@ Any comments, suggestions? [Let us know!](https://github.com/jaywcjlove/awesome-
 * [CheatSheet](https://www.mediaatelier.com/CheatSheet/) -  Hold the ⌘-Key to get a list of all active shortcuts of the current application. It's as simple as that. ![Freeware][Freeware Icon]
 * [DisplayBuddy](https://displaybuddy.app) - Control the brightness, contrast, input source and more of your external display directly from your Mac.
 * [f.lux](https://justgetflux.com/) - Makes the color of your computer's display adapt to the time of day. ![Freeware][Freeware Icon]
-* [Lunar](https://lunar.fyi/) -  Help you adujst brightness, contrast and volumn of your external display. [![Open-Source Software][OSS Icon]](https://github.com/alin23/Lunar) ![Freeware][Freeware Icon]
 * [Grayscale Mode](https://github.com/rkbhochalya/grayscale-mode) - An open source macOS app that lets you quickly toggle grayscale filter right from your menu bar or using a keyboard shortcut (⌥⌘G). [![Open-Source Software][OSS Icon]](https://github.com/rkbhochalya/grayscale-mode) ![Freeware][Freeware Icon]
 * [KeyCastr](https://github.com/keycastr/keycastr) - Open-source keystroke visualizer.  [![Open-Source Software][OSS Icon]](https://github.com/keycastr/keycastr) ![Freeware][Freeware Icon]
+* [Lunar](https://lunar.fyi/) -  Help you adujst brightness, contrast and volumn of your external display. [![Open-Source Software][OSS Icon]](https://github.com/alin23/Lunar) ![Freeware][Freeware Icon]
 * [NightOwl](https://nightowl.kramser.xyz/) - Automatically switch between macOS Mojave's light and dark themes by time of day or with a menu bar or keyboard shortcut. ![Freeware][Freeware Icon]
 * [One Switch](https://fireball.studio/oneswitch) - Mac menu bar app that adds various switches to the Mac's menu bar.
 * [Shifty](http://shifty.natethompson.io) - A macOS menu bar app that gives you more control over Night Shift. [![Open-Source Software][OSS Icon]](https://github.com/thompsonate/Shifty)