ICEcoder is a web-based IDE built with PHP.

ICEcoder can be run either online or locally. It’s blazing fast and comes with themes for many languages.

Some of the most prominent features of ICEcoder are:

• Find&replace;
• Secure login;
• Coding assist with Emmet;
• Easy database management;
• etc.

Editr is a JS/HTML/CSS playground that’s easy to use and loaded with useful features.

Editr highlights your code, gets it together and then displays it within an AJAX interface.

It uses jQuery and ACE Editor. You can customize it and host it yourself quite easily. In all, Editr looks like a harmless and highly effective playground for smaller projects or features.

Editor is a MarkDown editor with a slick design and useful features.

Editor differs from other MarkDown editors in that it’s a WYSIWYG/Plain text crossover: there is no ‘preview’ feature.

At first it seems minuscule, but Editor does have most of the features you’d expect from an editor:

• Word, character, and line count;
• Basic text editing tools;
• Shortcuts and undo/redo;
• A working full-screen feature and a broken preview feature (for Chrome).

Tern is a JavaScript auto completion tool that works as a server that sends results to compatible editors.

Tern can be hooked up to a compatible editor via a server or included as a JavaScript file. 

Tern is well optimized for larger chunks of code, and all in all it looks & feels very useful.

The developers sum up the library very well: ”Tern parses and analyzes a program on the fly, using a simple form of type inference along with a lot of heuristics and dirty tricks to approximate the types of the variables and expressions in the program.”

Tincr is a Chrome extension that allows editing and saving files from Chrome’s dev tools.

Tincr works like this: you open a file in web tools; you make any changes desired and press ctrl+s; voila! You have saved a file directly from Chrome Developer tools.

While there appear to be bugs on Windows 8, Tincr works on most other platforms. It’s pertinent to note that it also has a live reload feature.

tecate.js is a JavaScript library that checks for common HTML errors.

While the errors that this library corrects are basic — closing tags, missing equal signs, invalid element names, — the library has merit in case you’re writing such quantities of HTML that it’s hard to find the errors otherwise.

Also, checking your websites with tecate before production is always a good idea.