This plugin is outdated and might not be supported anymore
TSL iframe unfilter

TSL iframe unfilter

Details
View on WordPress

A simple plugin that prevents the Tiny MCE editor from removing iframe tags. WordPress will still block iframes based on privileges, so you will need a privileges plugin. WordPress 3.0 appears to allow iframes for Administrators and Editors by default.

Details

Plugin code:
tsl-iframe-unfilter
Plugin version:
1.0
Outdated:
Yes
WP version:
2.6 or higher
PHP version:
or higher
Test up to WP version:
2.9.2
Total installations:
200
Last updated:
2010-07-13
Rating:
Times rated:
0
filter
iframe
unfilter