Ariel

Leira Transients is a lightweight, developer-friendly plugin that simplifies the management of WordPress transients.
With Leira Transients, you can: 
– View all registered transients in a single dashboard. 
– Edit transient values and expiration times directly from the admin.
Important: This plugin is intended for users who know what they are doing or have experience in WordPress development. Modifying transient values incorrectly could break your site. Use with caution.
This plugin is ideal for developers, site administrators, and anyone who wants full visibility and control over WordPress’s transient system — no coding required.

Leira Transients

Manage WordPress transients easily with a clean, intuitive interface — view, edit, or delete them without touching code.

Josh Pollock

Makes caching the results of a WP_Query, WP_User_Query and WP_Meta_Query, via the transients API easy. Realize increased performance, by caching the results of your queries, with one simple function.
All saved queries are automatically reset when any post is updated.
Basic usage:
<ul>
<li>Specify arguments for the query ($args)</li>
<li>Give the query a name ($name)</li>
<li>$query = jpd2_better_query( $args, $name );</li>
<li>Use $query like you would any other WP_Query object.</li>
<li>See FAQ for other usages</li>
</ul>

JPD2

Makes caching WordPress queries via the Transients API easy.

Leira Transients vs JPD2