Humphrey Aaron

Get/display Tumblr posts via AJAX / Javascript / Client-side HTML requests. This plugin is great where the WordPress hosting server does not allow external HTTP requests, or where external HTTP requests on the server are preferred to be minimal.
Tumblr Ajax Features:
<ul>
<li>Display Tumblr posts, photos, videos and audios in a sidebar, post, or page</li>
<li>Styles to allow for customization</li>
<li>Widget options</li>
</ul>
Quick Start Guide:
<ol>
<li>After installing the Tumblr Ajax plugin on your WordPress site, make sure it is activated by logging into your admin area and going to Plugins in the left menu.</li>
<li>Before using the plugin, you must authorize your WordPress website to access your Tumblr account by adding the Widget to an existing Sidebar, and configuring it accordingly.</li>
<li>Play around with the various styles and options to find what works best for your site.</li>
<li>In order to change the CSS styles of Tumblr Posts, you can over-ride, using your own Stylesheet, the plugin’s default.css mark-up styles</li>
</ol>

Tumblr Ajax

Works with the latest WordPress version (4.4).



Now works

Display Tumblr posts via AJAX / Javascript / Client-side HTML requests

fsquared

The F2 Tumblr Widget displays recent posts from the provided tumblr blog.
It allows the user to select how many posts to display, to restrict which 
posts are shown by type and tag, and to render the posts as either a list 
or a slideshow.
Posts can be displayed in full, as title only, or with an excerpt. Photo, 
video and audio posts will have the media displayed when the display type 
is not ‘title only’.
The audio player in posts can now be automatically resized to match the 
selected media width – this is enabled by default, but can be deselected 
in the widget setup.

F2 Tumblr Widget

This widget displays recent posts from a tumblr blog.

Tumblr Ajax vs F2 Tumblr Widget