It is inspired from A Few of My Favorite Things on the Web 2006 of Hogg.
I am listing just the names –
E-Mail – Gmail
Social Networking – Orkut
Office Apps – Live
Online document management service – Google Documents and Spreadsheets
Image hosting – Zooomr
Calendar app – Google Calendar
Search Engine – Google
Homepage – Google homepage
Maps – Live Local
Blog – Lifehacker
Music Download – Cool Toad
Wiki – Wikipedia
Online Storage – Box.net
Bookmarking – None
To Do list – Google Calendar
Blog Search Engine – Technorati
Online Feed Reader – Bloglines
Blogging Tool – Performancing
Website Analytics – Google Analytics
These are all I could recall by now. Will update if I got reminded of any other category.