JetBrains Rider Editor
引文：
The JetBrains Rider Editor package provides an integration for using the JetBrains Rider IDE as a code editor for Unity. It adds support for generating .csproj files for code completion and auto-discovery of installations.
简单来说就是IDE的支持，用VS的可以将这个移除掉。
Test Framework
引文：
Test framework for running Edit mode and Play mode tests in Unity.
是一种在Editor 和 Play模式下测试代码的工具
[推荐阅读：C#单元测试 在unity中的使用简单介绍 基于unity 2018.3.8f1]
TextMeshPro
引文：
TextMeshPro is the ultimate text solution for Unity. It's the perfect replacement for Unity's UI Text and the legacy Text Mesh.
Powerful and easy to use, TextMeshPro (also known as TMP) uses Advanced Text Rendering techniques along with a set of custom shaders; delivering substantial visual quality improvements while giving users incredible flexibility when it comes to text styling and texturing.
TextMeshPro provides Improved Control over text formatting and layout with features like character, word, line and paragraph spacing, kerning, justified text, Links, over 30 Rich Text Tags available, support for Multi Font & Sprites, Custom Styles and more.
Great performance. Since the geometry created by TextMeshPro uses two triangles per character just like Unity's text components, this improved visual quality and flexibility comes at no additional performance cost.
TextMeshPro 是一种强大的文本解决方案，具有比原先Text更好的展示效果，多了很多功能。但是在使用过程中还是有一丢丢麻烦，关于生成中文字体方面，而且用起来和普通的text文本不太一样。这个网上的介绍已经很多了，可以自己百度。
TimeLine
引文：
Use Unity Timeline to create cinematic content, game-play sequences, audio sequences, and complex particle effects.
TimeLine 是Unity一种渲染电影内容，游戏片头或者片场动画等所提供的解决方案。如果项目中没有需求，也可以移除。
Unity UI
引文：
Unity UI is a set of tools for developing user interfaces for games and applications. It is a GameObject-based UI system that uses Components and the Game View to arrange, position, and style user interfaces. You cannot use Unity UI to create or change user interfaces in the Unity Editor.
UGUI 这个就不多说了是Unity的Core Package，属于核心包。
Version Control
引文：
The Version Control package gives you the ability to use either Collaborate or Plastic SCM for Unity (beta) in the Unity editor. To use Plastic SCM for Unity (beta), a Plastic SCM subscription is required. Learn more about how you can get started for free by visiting plasticscm.com.
Unity的云方案 Plastic SCM 和 Collaborate，在创建项目的时候可以选择，有一个单选按钮选择 Plastic SCM，具体有用过但是目前状态下会比较卡的说法，几个月以前了，从那以后没用过，不评价，我是都移除的。
Visual Scripting
引文：
Visual Scripting, previously known as BOLT, is an alternative workflow to design behaviours. Instead of the classic method of writing a C# script, visual scripting offers a way to design behaviours intuitively without code, by connecting events, actions, and data together in a graph.
以前是bolt，一种可视化的脚本编辑器，没啥用，可以移除。
Visual Studio Code Editor/Visual Studio Editor
引用：
Code editor integration for supporting Visual Studio Code as code editor for unity. Adds support for generating csproj files for intellisense purposes, auto discovery of installations, etc.
VS Code IDE和VS的支持。
