Y.Kohno

This is a flexible search form widget. 
You can easily generate a multi condition search form and display anywhere as widget.
複数のカスタムフィールド、投稿タイプ、カテゴリー、タグでの検索が可能な複合検索フォームを簡単作成できるプラグイン。ウィジェットで好きな場所に設置可能。
Currently supports 
– Custom Fields 
– Taxonomies 
– Categories 
– Post tags 
– Post Type

WP Meta Search

Search form for searching through custom fields, post types, categories, tags, and free text.

Eric Marden

adsdevshop

Easily export the metadata stored by one plugin or theme to another plugin or theme.
Data Portability is important. Data Portability allows you to easily move from one system to another and take your content with you. Metathesis allows you to do just that.
This plugin provides an easily extensible system for registering import and export sources. Out of the box it exports the Search Engine Optimized Title, Description, and Keywords data stored by the Thesis Theme a CSV file. It also ships with a second and third adapter to export the Thesis SEO data to the All in One SEO Pack plugin and vice versa.
More adapters are planned, and new ones can be written very easily by extending the Metathesis class and registering your adaptor via a WordPress filter provided by Metathesis. (Documentation forthcoming).
<h3>License</h3>
The Metathesis plugin was developed by Eric Marden on behalf of Robert Dempsey and Atlantic Dominion Solutions, LLC and is provided with out warranty under the GPLv2 License.
Copyright 2010 Robert Dempsey
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Metathesis

Migrate your SEO goodness and other meta-data from one theme or plugin to another WordPress theme or plugin.

WP Meta Search vs Metathesis