firimar

This simple plugin allows you to import any type of data from large CSV files into your wordpress installation.
Plugin reads CSV file and performs import of its records one by one through AJAX requests, so there are no server timeout issues.
You only need to provide PHP function to perform import of CSV field values into post or taxonomy term or whatever you need.
Usage example:
For example, assume we want to import posts from such CSV file: 
 title,text,brand,image 
 “Check this”,”Samsung content”,Samsung,”https://upload.wikimedia.org/wikipedia/commons/thumb/2/24/Samsung_Logo.svg/2000px-Samsung_Logo.svg.png” 
 “Some news”,”News Here are some news”,Philips,”http://www.underconsideration.com/brandnew/archives/philips_2013_logo_detail.png”
Here we have post title, post content, custom field Brand and thumbnail image.
We can use this code in theme’s functions.php file to implement import function:
<pre><code>add_action('lcih_import_csv_row', 'lcih_import_csv_row');
function lcih_import_csv_row($row)
{
 $post_data = array(
 'post_type' => 'post',
 'post_status' => 'publish',
 'post_title' => $row['title'],
 'post_content' => $row['text']
 );
 $post_id = wp_insert_post($post_data);
 if (!$post_id)
 {
 echo "Error inserting post.";
 return;
 }

 update_post_meta($post_id, 'brand', $row['brand']);

 if ($row['image'])
 LargeCSVImportHandlerPlugin::download_post_thumbnail($post_id, $row['image']);

 echo "Created post ".$post_id;
}
</code></pre>
After that we can go to plugin admin page, select CSV file to upload and click “Start import” button. Import process will begin.

Large CSV Import Handler

After trying almost all major CSV plugins, this is the one that works perfectly for large files. I have a file of 35MB with 83000 posts and was unable to import them but this plugin did it with ease. No server time issues, simple to use. Recommended!

Awesome Work, Great Plugin

Provides ability to import any type of data from large CSV files into Wordpress

themely

Quickly import demo content, widgets and settings for your new theme. This provides a basic layout to build your website and speed up the development process.
This plugin will create a page in APPEARANCE > Import Demo Content.
If the theme you are using does not have any predefined import files, then you will be presented with three file upload inputs.
First one is required and you will have to upload a demo content XML file, for the actual demo import.
The second one is optional and will ask you for a WIE or JSON file for widgets import. You create that file using the <a href="https://wordpress.org/plugins/widget-importer-exporter/" rel="ugc">Widget Importer & Exporter</a> plugin.
The third one is also optional and will import the customizer settings, select the DAT file which you can generate from <a href="https://wordpress.org/plugins/customizer-export-import/" rel="ugc">Customizer Export/Import</a> plugin (the customizer settings will be imported only if the export file was created from the same theme).
This plugin is based off the ‘One Click Demo Import’ plugin by @capuderg and @cyman, https://github.com/proteusthemes/one-click-demo-import.
As well as the improved WP Import 2.0 plugin by @humanmade, https://github.com/humanmade/WordPress-Importer.
<h3>License</h3>
Theme Demo Import uses ‘One Click Demo Import’ plugin script 
https://github.com/proteusthemes/one-click-demo-import 
(C) 2016 ProteusThemes.com 
Licensed under the GNU General Public License v2.0, 
http://www.gnu.org/licenses/gpl-2.0.html
Theme Demo Import uses ‘WordPress Importer’ plugin script 
https://github.com/humanmade/WordPress-Importer 
(C) 2016 @humanmade 
Licensed under the GNU General Public License v2.0, 
http://www.gnu.org/licenses/gpl-2.0.html
<h3>Copyright</h3>
Theme Demo Import, Copyright 2016 Ishmael ‘Hans’ Desjarlais
Theme Demo Import is distributed under the terms of the GNU GPL
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 Street, Fifth Floor, Boston, MA 02110-1301 USA.

Theme Demo Import

We've tested this plugin extensively and packaged it with our themes, it works flawlessly.

Works great

Quickly import demo content, widgets and settings in one click. Made for theme authors to simplify importing demo content for their users.

Large CSV Import Handler vs Theme Demo Import