Text Editor that auto completes the line

I haven't used it, but I understand that Notepad++ does this. I'm sure there are others, depending on which language you are using (you didn't say).

This is also a common feature of IDE's, such as Visual Studio (something I have used).

Sublime Text 2 does, but it is more of a 'memory' thing. If it's something you've use before it will have an autocomplete.

But if you're talking about the extent to which Xcode does autocomplete, I haven't seen (or heard) of any text editor that does it to that extent.

This is a feature called auto-complete and is common in nearly all Integrated Development Environments (IDE for Short). There are many out there, some better suited to the languages you know. NetBeans is a well known one that works for many programming languages and is completely free.

https://atom.io/

http://brackets.io/

install the plugin emmet.

https://code.visualstudio.com/ code by microsoft has intellisense it's free

All of these have syntax hilighting which will help you catch errors.

https://atom.io/packages/autocomplete-plus try installing this package.