1- Blogger
Download the latest release of the official Blogger app, and start blogging on the go. With Blogger for iOS you can:
* Compose a post that you can save to draft or immediately publish
* View list of your saved and published posts
* Switch account/blog if you have more than one
* Embed an image from the gallery, or, by taking a picture directly from the app
* Add labels to your posts
* Add location information
2- WordPress
It’s easy to manage your WordPress blog or site from your iOS device. With WordPress for iOS, you can moderate comments, create or edit posts and pages, view stats, and add images or videos with ease. All you need is a WordPress.com blog or a self-hosted WordPress.org site running 3.1 or higher.
3- Edublogs
Manage and update your Edublog right from your iOS device! This app works perfectly on iPhone, iPad, and iPod touch for Edublogs.org and Edublogs Campus.
4-TypePad
Update your blog and share pictures with the world from wherever you are with TypePad. Built to connect with the award-winning TypePad blogging service,
5- Blogsy
Blogsy is a tool designed specifically to take full advantage of the iPad’s unique touch functionality. Adding your photos and videos is as easy as dragging them from the media sidebar and dropping them into your blog post.
6- BlogPress
BlogPress is an easy blogging app for both iPhone/iPod Touch and iPad and it is highly intergraded with your favorite social networks: Facebook, Twitter, YouTube, Flickr and Picasa!!