Since I am using Graffiti CMS for this site, which supports extending the site via Widgets and Plug-ins, I thought I post what I am finding out in the community.
Widgets can be thought of modules which add/modify ways to display content on your site. Think of them like adding a Flickr photo gallery, or a Tag Cloud.
Plug-ins can be thought of adding back end functionality to the site. Some of them include things like auto-generating a Sitemap as you add content, or pinging blog publishing services.
Extensions are additions that can be enabled through Chalk code to display additional information on your site.
Themes are designs which you can upload to alter the visual look of your site.
I use some of these, but I don’t endorse their quality or usefulness. I am just trying to add a place to catalog what I find. The GCMS Marketplace is now operational, but I do not think they have started adding alot of the existing modules to be availiable on there yet.
Community Code Projects
|CodePlex Graffiti Extras||A collection of Widgets, Themes, and Extensions|
|CodePlex Chalk Extensions||A collection of Chalk extensions to enhance your site|
|Photos||uses the API key to display your flickr photos. Includes Sourcecode project|
|Flickr||Photos||Uses tags to display your Flickr photos|
|Posts||Displays post count by month|
|Picasa Album||Photos||Display Photos from Picasa Web Album|
|Sitemap Generator||SEO||Auto generates a Sitemap of your site for use by search engine discovery|
|Mobile Theme Selector||Theme Management||Allows you to specify a seperate theme for mobile users|
|Pingomatic||Blog notify||Pings popular blog services when you add a new post|
|RSS Extender||Feeds||Adds more fields to your RSS feed data|
|301 Redirector||File||Redirect CS links to Graffiti pages for migration|
|network||Compresses data over HTTP to speed up web site display|
|Media||Display streaming Silverlight videos in posts|
|Blog Extensions||Blogging||Adds pingback/trackback support, GeoRSS support, Auto Ping on update, and seperate Comments RSS feed for GCMS sites|
|Related Posts in RSS||RSS||Adds a list of Related Posts to your RSS feed for posts|
|Notify Twitter on New Post||When you add a new post, it will notify your followers on Twitter|
|Community Reactions||trackback||Adds a list of discovered sites which link to the post automatically.|
|Post Navigation||Navigation||Adds navigation options to posts|
|Search Relevancy||Search||Shows other posts which may match the search terms from search engines|
|Technorati Trackbacks||trackback||Display trackbacks from Technorati with the post|