Offline WordPress post editor/creator

Question

I have a WordPress site hosted on my personal server. I will be unavailable by Internet for a little while, and I'd like to write up some posts for my blog.

Normally, you need to be connected to WordPress to start writing the blog, and it will do offline-saving automatically. But this is limited to one entry, per tab. I could use Notepad, but it doesn't have spell check built in. I could use Microsoft Word, but the "Paste from Word" leaves a lot to be desired.

What I'm looking for is a program that does the following:

• Start a new post while offline
• Lets me edit posts I created already with the program
• Spell check
• Uploads new posts when I reconnect
• Has the same features as the online editor (i.e. toolbars, WYSIWYG and code editor)
• Free (as in beer)
• Works on either Windows or Mac OSX

Bonus features:

• Edit posts currently on the website (with an offline copy)

Answer 1

As I recall the SU blog runs on wordpress, and I was using windows live writer to post on it. Its part of windows essentials, works with WP blogs and if I recall correctly did/does most of what you have listed there

• Start a new post while offline - yes
• Lets me edit posts I created already with the program yes (though I can't remember if it edits uploaded posts)
• Spell check - and grammar check
• Uploads new posts when I reconnect - yes
• Has the same features as the online editor (i.e. toolbars, WYSIWYG and Code editor)kind of - it has its own UI but its broadly compatible and in some ways better
• Free (as in beer) yes
• Works on either Windows or Mac OSX - windows only

Answer 2

StackEdit is a very nice Markdown web app editor that works off-line. I can publish as HTML, but adding a WordPress plugin to work with Markdown is an option.

• Start a new post while offline
  As it works offline, you can create any number of documents and update/upload when online

• Lets me edit posts I created already with the program
  You'll copy the post content in a new SE document and publish it against the same post ID

• Spell check
  IMHO, that's browser territory

• Uploads new posts when I reconnect
  After reconnecting, just hit the publish button and it goes live

• Has the same features as the online editor (i.e. toolbars, WYSIWYG and code editor) Just basic features for the editor

• Free (as in beer)
  Yes.

• Works on either Windows or Mac OSX
  Yes.

• Edit posts currently on the website (with an offline copy)
  See Upload when reconnected

StackEdit.io

StackEdit is a full-featured, open-source Markdown editor based on PageDown, the Markdown library used by Stack Overflow and the other Stack Exchange sites.
https://github.com/benweet/stackedit/

Features:

• Real-time HTML preview with Scroll Link feature to bind editor and preview scrollbars
• Markdown Extra/GitHub Flavored Markdown support and Prettify/Highlight.js syntax highlighting
• LaTeX mathematical expressions using MathJax
• WYSIWYG control buttons
• Online synchronization using Google Drive (multi-accounts) and Dropbox
• One click publish on Blogger, Dropbox, Gist, GitHub, Google Drive, SSH server, Tumblr, WordPress

Answer 3

For the mac users there's blogo. By the time of this writing, the version 1 has been discontinued and the version 2 hasn't yet been released, but there's a video on the official site showing its capabilities. Those include:

• WordPress, tumblr and blogger / blogspot support
• Offline composing
• Editing of already published posts
• Visual editor that uses the actual site theme to render the preview

Possible drawbacks:

• Works only on mac
• Not free

Looks like it doesn't offer spell-checking natively, but there will be a plugin system and it's possible that there'll be a speelcheck plugin for blogo:

Power Ups are add-ons that will be available via in-app purchase to make your Blogo experience even better.