29. WP Super Edit

WP Super Edit adds a host of WYSIWYG options to the standard WP visual editor. It adds two full rows of additional features to your visual editor toolbar, including options for applying specific styles and for adding and formatting tables. It’s known to work with version 2.8 and 2.8.1.
75 Best Wordpress Plugins That Make Bloggers Lives Easier - Blog Lorelei Web Design

30. Riffly Webcam Video Comments

Riffly is a free service that easily plugs into your site allowing visitors to create video and audio comments.

riffly-helpful-wordpress-comment-plugin

31. Ozh’ Absolute Comments

Absolute Comments is a comment manager plugin that lets you instantly reply to comments, either from the original Manage Comments administration page, or from the email notification, without the hassle of visiting the post first.

absolute-comments-helpful-wordpress-comment-plugin

32. NoFollow Free

This WordPress plugin remove the “nofollow” attribute from your wordpress blog’s comments (precisely from the author’s links) and/or from the comments text links and it inserts (if you want) an image band at the top of your pages with the phrase: “NOFOLLOW FRE” to encourage your users to submit comments. The last release includes new options to replace the nofollow only when the author posted X comments before and put back the nofollow when some blacklisted words are matched. The replacement of the nofollow is also based on the users type (registered and visitor users). Every option can be customized by the options page “NOFF”.

no-follow-helpful-wordpress-comment-plugin

33. Subscribe to Comments

Subscribe to Comments is a robust plugin that enables commenters to sign up for e-mail notification of subsequent entries. The plugin includes a full-featured subscription manager that your commenters can use to unsubscribe to certain posts, block all notifications, or even change their notification e-mail address!

34. Subscribe to Double-Opt-In Comments

Allows readers to receive notifications of new comments that are posted to an entry, with Double-Opt-In Feature. Based on version 2 of “Subscribe to Comments” from Mark Jaquith

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35. WP Comment Remix

WP Comment Remix adds a plethora of new options and features to WordPress. From Reply and Quote links for commenters, to a full upgrade to the edit comments pages in the admin panel, WPCR will save you time and effort when running your blog.

36. Moderation Notify Author

WordPress doesn’t automatically notify the author of a post about waiting comments. Instead all comment moderation requests go to the admins. This plugin will notify the author of the post as well as the admin. This will allow the author to moderate the comments too.

37. WP Slimbox 2

A WordPress implementation of the stellar Slimbox2 script by Christophe Beyls (an enhanced clone of the Lightbox script) which utilizes the jQuery library to create an impressive image overlay with slide-out effects.

wp-slimbox-2-gallery-wordpress-jquery-plugin

38.WordPress jQuery Lightbox Plugin

Used to overlay images on the current page, a little bit different popular Lightbox plugin.

If you want to see live demo of this plugin, just scroll down the page to see sample image and click on it.

lightbox-wordpress-jquery-plugin-useful-resource

39. Carousel Gallery (jQuery)

This plugin tweaks the gallery tag in WordPress 2.6 thusly by replacing it with a javascript carousel. The plugin uses jQuery and a jQuery plugin called jCarousel.

carousel-gallery-wordpress-jquery-plugin

40. Shadowbox JS

Shadowbox is an online media viewing application that supports all of the web’s most popular media publishing formats. Shadowbox is written entirely in JavaScript and CSS and is highly customizable. Using Shadowbox, website authors can display a wide assortment of media in all major browsers without navigating users away from the linking page.

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shadowbox-js-wordpress-jquery-plugin

41. jQuery Lightbox For Native Galleries

Makes the native WordPress galleries use a lightbox to display the fullsize images.

lightbox-native-gallery-wordpress-jquery-plugin

42. jQuery Comment Preview

Live comment preview without page reboot. Works on jQuery.

live-comment-preview-wordpress-jquery-plugin

43. WordPress Plugin jQuery Pagebar

jQuery is a fast and concise JavaScript Library that simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development.

pagebar-navigation-wordpress-jquery-plugin

44. Google Analyticator

Google Analyticator adds the necessary JavaScript code to enable Google Analytics logging on any WordPress blog. This eliminates the need to edit your template code to begin logging. Google Analyticator also includes several widgets for displaying Analytics data in the admin and on your blog.

google-analyticator-wordpress-jquery-plugin

45. OpenID Comment Form