Creating Simple Plugin to Post To WordPress

Do you mean you want to create posts from a static page?
If so, you can do that by creating a custom page template (https://codex.www.ads-software.com/Pages#Creating_Your_Own_Page_Templates) with the following code:

<?php
/*
Template Name: Submit Post Form
*/
?>

<?php get_header(); ?>
<div id="main">
<div id="content" class="narrowcolumn">

<div class="post">
<h2><?php single_post_title(); ?></h2>

<?php if ( !current_user_can('edit_posts') ) : ?>

To submit posts, first <?php wp_loginout(); ?> or <?php wp_register('', ''); ?>.

<?php else : ?> <!-- user can post -->

    <!-- handle post submission -->
    <?php if ( 'POST' == $_SERVER['REQUEST_METHOD'] && !empty( $_POST['action']) && $_POST['action'] == 'post') : ?>

        <?php check_admin_referer('submit-post') ?>

        <?php $post_id = wp_insert_post( array(
            'post_title'    => strip_tags($_POST['posttitle']),
            'post_content'  => $_POST['posttext'],
            'tags_input'    => $_POST['tags']
        ) ); ?>

        <?php if ($post_id > 0) : ?>
            <p>Thank you for submitting your post!</p>
            <p>You can still
            <?php edit_post_link( "edit your post", "", "", $post_id ); ?>
            until it's published by the editors.</p>
        <?php else : ?>
            <p>Error saving your post. You can send it by email instead:
            <?php echo get_option('admin_email'); ?>
            </p>
        <?php endif; ?>

    <?php else : ?> <!-- show submission form -->

        <form id="new_post" name="new_post" method="post" action="<?php the_permalink() ?>">
        <input type="hidden" name="action" value="post" />
        <?php wp_nonce_field( 'new-post' ); ?>

        <p>
        <label for="title"><b>Post Title:</b></label><br />
        <input type="text" name="posttitle" id="posttitle" style="width: 99%; font-size: larger;" />
        </p>

        <p><b>Author:</b>
            <?php echo $user_identity; ?> &nbsp;
            (<a href="<?php echo wp_logout_url(get_permalink()); ?>">logout</a>)
        </p>

        <p>
        <label for="posttext"><b>Post Text:</b></label><br />
        <textarea name="posttext" id="posttext" rows="30" style="width: 99%; font-size: inherit;"></textarea>
        </p>

        <p>
        <label for="tags"><b>Tags:</b></label><br />
        <input type="text" name="tags" id="tags" style="width: 99%;" />
        </p>

        <input id="submit" type="submit" value="Submit Post" />
        </form>

    <?php endif; ?> <!-- submission form -->

<?php endif; ?> <!-- user can post -->

</div>
</div>
<?php get_sidebar(); ?>
</div>
<?php get_footer(); ?>

Thanks, but not quite. I have a static page (not related to the blog at all) and it updates once a day. I want to scrape the contents of the page and post it as a post.

Thanks for responding though!