Buffer Editor is described as 'POWERFUL code and text editor that lets you easily develop software, review code or take notes on the go' and is a Code Editor in the Development category. There are seven alternatives to Buffer Editor for a variety of platforms, including iPhone, iPad, Mac, Online / Web-based and Android. Most alternatives are Code and Text Editors. The best alternative is Codeanywhere. It's not free, so if you're looking for a free alternative, you could try Pico Compiler or Code Master. Other great apps like Buffer Editor are Textastic (Paid), Nova (Paid), Koder Code Editor (Paid) and Coder (Paid).
Koder is a code editor for iPad and iPhone. It does have many features including syntax highlighting, snippet manager, tabbed editing, find and replace code, editor theme, remote and local files connections, and many more.
Pico Compiler is a lightweight, offline development environment for writing Java programs. It is designed primarily for students, providing an simple interface and the ability to interactively evaluate Java source code.
The Code Master Programming Suite for the iOS platform provides a visual interface for creating and editing universal source code of any language, as well as previewing and publishing options for when you are on-the-go.