Merge pull request #1603 from iwishiwasaneagle/master

Added Zube to "Documents & Productivity"

README.md

@@ -326,6 +326,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Todoist](https://developer.todoist.com) | Todo Lists | `OAuth` | Yes | Unknown |
 | [Vector Express](http://vector.express) | Free vector file converting API | No | No | Yes |
 | [WakaTime](https://wakatime.com/developers) | Automated time tracking leaderboards for programmers | No | Yes | Unknown |
+| [Zube](https://zube.io/docs/api) | Full stack project management | `OAuth` | Yes | Unknown |
 
 **[⬆ Back to Index](#index)**
 ### Environment