Search Engine (SEO) & Performance Optimization (WPO) via caching. Integrated caching: CDN, Minify, Page, Object, Fragment, Database support.
Keep website users and MailChimp mailing lists in sync and create campaigns from posts.
Duplicate existing pages on your site, edit them, and merge them back over the original. Think drafts on steroids.
A WordPress plugin to merge and compress the CSS and JS links on the page.
Admin Flush W3TC Cache works with the W3 Total Cache plugin. It simply adds an "Empty All Caches" option to every Admin page.
Make and save edits to published posts/pages in WordPress without immediately replacing the public content.
Provide notification emails and controls for bbPress subscriptions, merge, and split functions.
Plugin for easy merging duplicate terms (tags, categories, ...)
WordPress database merging made easy
Lightweight plugin aiming to solve one of most tedious WordPress issues: amount of different scripts added by theme or plugins.
Modify or re-map your taxonomy or category structure
Merge theme settings from two Weaver II, Aspen, or Weaver Xtreme saved settings.
vBPress seamlessly integrates WordPress with vBulletin
Plugin to merge multiple images.
WordPress plugin that merge Contact form 7 functional with google spreadsheets (also works with private spreadsheet).