Here are some "frequently used" modules
SEO (Search Engine Optimization)
- Path
- /node/1 -> /welcome
- Pathauto
- Automatically sets a path (based on title, classification, etc.)
- Should use with taxonomy
- Nodewords (meta tags)
- Meta tag system to insert tags ("set and forget")
- XML Sitemap (gsitemap)
- Takes content and organizes with updates (autopilot)
- Good theme...
- not a module, but a good theme, puts data first
Content
- Taxonomy
- classification of nodes... NOT "category"
- Views
- Slice and dice content
- Panels
- Plays well with views
- Diff
- Compares new and old versions
- CCK
- Create custom content types, plays well with views
- Can be used to create custom forms
Administration
- Update status
- Tells when modules are updated
- Login tobaggon
- e-mail activation, and signup
Community
- Forum
- Comments
- Akismet or captcha
- captcha can use textimage (accessibility)
- Organic Groups
- Organize people
- Buddylist
- Keep track of your buddies
- Private MSG
- Send messages
- serviceLinks
- digg it
Development
- Devel
- Gives a lot of development tools, mashed together for convenience
- Don't run on a production site
e-Commerce
- eCommerce
- Sell stuff... maybe wait for uberCard
- Requires token
Editing
- tinymce
- Best of a terrible thing
- OR QuickTags
- Can't use with tinymce