CFlash is very easy to use

Chessboard render is a plugin for B2evolution blogs that converts FEN (Forsyth-Edwards Notation) notation or an alternative 8×8-layout to a chessdiagram using HTML with 8×8 images. Options include a border and a subset of an 8x8 chessboard. The images are provided with the plugin. You end up with a chessdiagram depicting your position. If you ever want to blog about chess, this is the plugin you're after.

More info
or leave a comment

Footnotes is a footnote plugin for b2evolution. It lets you add unobtrusive side/snide/additional/informative remarks without getting in the way of the main text. So far, it supports two ways of rendering those footnotes: via tooltips using MooTool's Tips library or via plain anchor jumps using <a href> and <a name>.

boo-box is a cute little virtual box that will take your audience to the wonders of on-line shopping without having to leave your blog, just by clicking on a word or image on it. Every purchase made in a boo-box results in a commission to you thru a affiliate marketing program, currently available on every major on-line store.

Using this plugin, you can display LaTeX in your posts through mimetex.cgi. LaTeX is a document markup language used by scientists and mathematicians.