EZThread
動画：
EZThread – Easy Threads and Simple Script for Unity
参考：
EZThread – Coroutine Replacement, Easy Threads | Unity Asset Store [Official]
JSON .NET
参考：
JSON .NET For Unity | Unity Asset Store [Official]
Simple Encryption
参考：
Simple Encryption – Md5, Base64, AES, RSA | Unity Asset Store [Official]
UniTask
参考：
Cysharp/UniTask: Provides an efficient allocation free async/await integration to Unity – GitHub
async/await を使う上で UniTask のキャンセルは例外処理である件 | 渋谷ほととぎす通信
Unity Standalone File Browser
参考：
gkngkc/UnityStandaloneFileBrowser: A native file browser for unity standalone platforms – GitHub