Image Management Tools
Aniga Gallery – Allows you to create picture galleries that use the WordPress comment system.
Batch Image Uploader – Upload and resize multiple images to your blog at once.
Duh Gallery – Simply creates a photo gallery from your uploads folder in WordPress.
ImageManager – Includes interface for browsing and uploading images and basic tools such as cropping and rotating.
WP Image Gallery – Create photo galleries from within WordPress and display them in posts.
fMoblog – Post pictures with descriptions from a mobile phone.
Pop-up Image Gallery – Photo gallery plugin with various options for transitions
PhotoZip – For quickly uploading photos; allows you to simply upload a .zip file to create an image gallery.
PictPress – Automatically generates a picture post from a directory on your server. Resizes pictures on the fly.
Importing Images from Other Services
Another Flickr – Allows your readers to browse thumbnails from your Flickr albums and go directly to full size images.
BubbleShare – Display photo galleries from your BubbleShare account.
Facebook Photos – Shows thumbnails of photos from your linked Facebook account.
Flickr Photo Album – Pulls in your Flickr photo sets and displays them as albums in WordPress.
FlickrRSS – Displays most recent images from any RSS feed from Flickr such as a user, group, or tags page.
Fotobook – Import your Facebook photo albums into a WordPress page.
ImageShack Uploader – Upload an image to ImageShack's free storage service and insert a thumbnail into your posts.
Slickr Gallery – AJAX photo gallery that pulls in images and photosets from Flickr.
Smugmug Gallery Bar – Insert photos from your Smugmug account into blog posts.
Image Display Effects & Hacks
Enlarger – Displays a thumbnail but loads the bigger image in the background so when clicked the full size version loads instantly.
IImage Panorama – Helps you create a 360 degree panorama picture to add to your blog.
Image Headlines – Create cool text images for the titles of your posts.
Lightbox 2 – Generates thumbnails that when clicked load in a lightbox.
Multi-Topic Icon: Shows images that represent each of the categories assigned to a blog post.
Random Image – Pulls a random image you have places on your blog and links back to the post it came from.
Transparent PNG Fix – Make sure your PNG files don't look nasty.
WP Wetfloor – Create the ever-popular reflection effect for the images on your blog.
Playing Music
Del.icio.us MP3 Player – Makes links to MP3s in your posts playable and easily postable to del.icio.us.
Audio Player – Inserts a simple MP3 player into your posts that plays uploaded audio files.
XSFP Player – Flash player that allows you to embed music on your blog via http.
What Am I Listening To?
DG PlayingNow Updater – Displays the song you are currently listening to on iTunes, MSN Messenger, or J. River Media Center.
EZ-Scrobbler – Displays your most recently listened to tracks on last.fm.
iTunes Spy – Displays your most recently listened to tracks on iTunes.
Pandora Feeds – Displays data from Pandora feeds, for example, a list of your stations, bookmarked songs, and bookmarked artists.
onAirNow – Now playing plugin that displays most recent song from iTunes or WinAmp.
Podcasting Tools
Odeo – Embed a podcast you've recorded on Odeo.
Podcast Release – A “release†form for guests of your podcast, accepting your terms.
PodPress – Full featured plugin for podcasters including feed generation, iTunes preview, and download stats.
iPodCatter – Helps podcasters created a valid feed for the podcast directory on iTunes.
Miscellaneous Audio Tools
Evoca Browser Mic – Allow your blog readers to send you voice comments which you can later post to your blog.
Odiogo – Converts your text to speech and provides a link for your readers to listen to your posts.
Video Tools
Anarchy Media Player – Plays a wide variety of audio/video file formats in the appropriate player on your blog.
Easy Inline SWF - Allows you to insert Flash files in .swf format into your posts without any weird tags.
SeeTheFace – Complete tool for recording video and posting to your blog.
Extreme Video – Plays any .flv file on your blog with support for YouTube, Google Video, Quicktime, and more.
Noembedder – Automatically adds a noembed section to any embedded content that does not already have one.
YouTube Brackets – Allows you to simply enter a URL for a YouTube video versus copying and pasting embed code.
wordTube – Video player that includes the ability to program a menu of videos.
TubePress – Display YouTube galleries as blog posts or a sidebar item.
YouTube Video Gallery – Displays thumbnails for any gallery from YouTube.
vPIP – vPIP stands for “Videos Playing In Place,†meaning it will only embed after a specified image or link is clicked by the user. (via)