WordPress for iPhone is the first Open Source app that lets you write posts, upload photos, and edit your WordPress blog from your iPhone or iPod Touch. With support for both WordPress.com and self-hosted WordPress (2.5.1 or higher), users of all experience levels can get going in seconds.
KABLOG is a tool for mobile phones and PDAs that allows you to post photos and blog entries to blog servers and services such as TypePad, Movable Type, Blogger, WordPress, B2, Blog-City, UserLand (Radio), Roller, SnipSnap, and other blog servers that support either the simple blogger xmlrpc interface or the extended metaWeblog interface.
MobileAtom J2ME allows you view, add, edit and delete blog entries using Atom API. It supports blog sites with Atom support such as Blogger.com.
Pebble is a very lightweight, personal blogger that is written as a web application to run inside standard J2EE web containers using standard technologies such as JSP, Servlets, filters, JSP custom tags, JSTL and JAXP.
Pebble moblog is a J2ME/MIDP client that lets you publish to your Pebble blog from your phone.