We're using Concourse extensively at HelloFresh (>130 devs). It's not without its quirks, but I've little to complain about so far, except perhaps the polish of the UI.
Trello. Occasionally, on spotty cellular connections, the sync messes up, but that's rare. Overall, it's a great-looking app, super simple to grok and use, and saves me tons of cognitive load every day.
I've seen it mentioned by a few people, including Redux creator Dan Abramov (who is very open about tweeting links to 'competing' libraries!), but I've only taken a brief look so far.
My initial impression is that it seems really interesting, although I wonder if the use of generators will scare people away. Many devs are already exhausted with the number of new JavaScript features they're being told to learn.
I definitely want to dig a bit deeper and try it out properly though.
Best comparison I've seen so far is that it's sort of like "background processing threads for Redux". The downside is that it might not mix well with time-travel debugging, because a saga effectively has its own internal state.
That said, Dan Abramov does seem to think it's a very intriguing approach, so it's worth keeping an eye on.
The Windows version runs fine in WINE, alternatively they offer a very cut-down web-based solution called 1Password Anywhere (which I use on my Chromebook).
(There's an official Android client too, which wasn't mentioned above)
http://codebugapp.com is a fantastic front-end for Xdebug. I get a lot of mileage out of this, not least because I only had to set it up once and now it works with whichever editor I'm trying out this week.
Not _most_, but I do a decent amount of development through Cloud9 on a Chromebook. I'd intended to install Ubuntu on it, but actually because of C9 I've not needed to. It's also proven invaluable for assisting people; the ability to spin up a fresh new C9 VM to collaboratively debug a project has been very useful.
It's come on leaps and bounds in the past few versions IMO. Partly because of new language features (proper namespaces (enabling easy autoloading), traits etc) and partly because of the community pushing decent standards [0], [1].
It's also worth pointing out that since 5.3 the Laravel framework [2] has been created and in its latest iteration it draws a lot of inspiration from ASP.NET MVC and Rails (the former resonates with me coming from .NET land; though I've not much experience with the latter), making it a great framework for rapid prototyping. Its coding style encourages a lot of good practices and it's become very much the go-to PHP MVC framework, at least for me.
A good resource for reading up on 'modern' PHP is PHP the "Right" Way [3] - there's also a (very recently released) O'Reilly book on Modern PHP [4] written by the creator of a popular micro framework [5] - I've not had chance to read it yet (and I'm sure I'm not its target audience) but I have enough faith in the author to know it'll be a worthwhile resource.
Having said all of this, it is still PHP and you will still be working with some of the old quirks. I've just grown somewhat fond of them :)
