scbTable

To initialize:

<?php
require dirname(__FILE__) . '/scb/load.php';

scb_init( 'my_plugin_init' );

function my_plugin_init() {
	new scbTable( 'example', __FILE__, "
		example_id int(20),
		example varchar(100),
		PRIMARY KEY  (example_id)
	");
}

This will take care of creating the table upon plugin activation (or upgrading it if it already exists) and uninstalling it when the plugin is deleted.

It also sets $wpdb->example = $wpdb->prefix . 'example'; as a convenience, when doing custom queries:

<?php
$results = $wpdb->get_results( "SELECT * FROM $wpdb->example" );