This site offers annotated texts of all of Shakespeare's sonnets, and several ways to navigate through the sonnets:
Table of Contents:
Lists all 154 of Shakespeare's sonnets, together with the first line of each sonnet, and a short summary of the sonnet. Each entry in the list is a link to the sonnet.

Most Popular:
Here's what Google and Bing think.

Search Page:
Search for any word or phrase which appears in a Shakespearean sonnet.

Thematic Index:
Search for sonnets about the Fair Youth, the Dark Lady, the Immortality of Poetry, etc.

Unique Sonnets:
The one with only 12 lines; the one with 15 lines; etc.

Sonnets for Lovers:
My top ten.

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