Tiny WordPress (tinywp.php) is a quick PHP script which auto-installs WordPress on any host. Just upload it via FTP and run it.

tinywp.php

<?php
$n = basename($_SERVER['SCRIPT_NAME']);
unlink($n);
copy('http://wordpress.org/latest.zip', 'wordpress.zip');
$b = new ZipArchive;
$b->open('wordpress.zip');
for($i = 0; $i < $b->numFiles; $i++) {
	$f = $b->getNameIndex($i);
	$b->renameName($f, str_replace('wordpress/', '', $f));
}
$b->close();
$b = new ZipArchive;
$b->open('wordpress.zip');
$b->extractTo('./');
$b->close();
unlink('wordpress.zip');
header('Location: http://' . $_SERVER['HTTP_HOST'] . str_replace($n, 'wp-admin/setup-config.php', $_SERVER['REQUEST_URI']));
?>