pen.io is described as 'Pen.io is a super fast way to publish content online. It takes just seconds to create a page and start adding content. Pen.io has been designed as a more permanent alternative to blogs. Blogs are great for posting regular content - with Pen' and is an website in the Development category. There are more than 10 alternatives to pen.io, not only websites but also apps for a variety of platforms, including Mac, Windows, Linux and iPhone. The best alternative is Write.as. It's not free, so if you're looking for a free alternative, you could try Rentry.co or Tot. Other great sites and apps similar to pen.io are recordando (Free, Open Source), NoteAway (Free), TreeNoote (Free) and Bundled (Free).
NoteAway is the simplest, most convenient way to take quick notes on OS X.
NoteAway has lots of powerful features for free, like iCloud syncing,
rich text, attachments, simple import/export, and a variety of customizable options.
Midnight is a place for networked writing. You can think of it as write.as meets roam. Figuratively, it aims to be the web equivalent of your local pub. a place you can go to and talk about your day with strangers or friends. then when you leave, it doesn’t follow you home.