Resonate

1. Freshbooks Invoicing and Timesheets
is an online estimating, invoicing, project management and time tracking service that gives your business a professional image, no matter how small. I use it to invoice all my clients online and it can even be set up to automatically bill and debit the credít cards of recurring clients every month. It also has built in staff timesheets and project management tools for online collaboration.
Price: Free for 3 clients or less

2. XML Sitemaps Generator
trawls through all levels of your site to generate an XML sitemap. It also gives you a running count of pages, provides a text-based URL líst and a HTML sitemap you can import straight into your site. The online version of the generator is free for sites of less than 500 pages, but there's also a low-cost script-based version for large sites that can be set up to automatically index your site, upload an updated XML file to your server and ping Google and Yahoo when done.
Price: $0

3. Proposal Kit
takes the chore out of creating and tailoring client estimates and proposal contracts. With over 200 pre-designed self-guiding templates ready to fill in the blanks with your company, project/product/service and client information, ProposalKit has already half completed your proposal for you.
Price: USD 47.00

4. ClickTracks
As far as site analytics goes, the depth and accuracy of data provided by ClickTracks just can't be beaten, in my opinion. The visual analysis ClickTracks provides is probably its best known feature, with statistical data overlaying actual screenshots of your web site pages. The ability to flag individual visitors or groups of visitors based on unique identifiers (such as all persons who visited page x or all persons who bought product d) provides a level of analysis that other analytical packages can't compete with.
Price: USD 79.00mth

5. AWeber
is a multiple auto responder and mailing líst management service rolled into one. Members can send an unlimited number of campaigns, follow up messages, and newsletters to an unlimited number of approved opt-ín lists. For newsletter purposes, a wide range of templates are provided, as are free training guides and videos to help you create campaigns.
Price: USD 19.95mth

6. JROX
Affilíate Manager software (JAM) is a super powerful affilíate program that includes follow up email tools, email broadcasting, custom URLs and the ability to create up to 10 affilíate downlink levels. It offers affiliates groovy 3d Flash-based graphs and charts displaying their referrals and commissions and an organized marketing tools area for storage of banners, links and promotional materials.
Price: Free for 50 affiliates or less

7. Keyword Discovery
is an advanced keyword research and search term suggestion tool produced by Trellian.
Price: USD 69.95mth

8. Google Analytics
is free web-based site metrics / analytics software hosted by Google. After you include tracking code on all selected pages of your site, Google collects data regarding visitor activity and then you are able to log into an Analytics interface and view site activity and produce reports.
Price: $0

9) Backlinkwatch.com
Type your URL into Backlink Watch and get complete detailed information about the quality and quantity of backward links pointing to your website. It will show you anchor text, Google Toolbar PageRank, total outbound links on that page and nofollow flag for each of your inbound links available.
Price: $0

10) Jim Boykin's tools
A collection of 17 free SEO tools developed by Jim Boykin and his staff, including a cache analyzer, Backlink checker, keyword density tool and multiple inbound and outbound link checking tools.
Price: $0

__________________

Resonate

11) Google Webmaster Central
is Google's one-stop shop for webmaster resources. It contains answers to common questíons about Google crawling and indexing and guidelines for webmasters to follow when publishing their content. It also provides statistics, diagnostics and management of Google's indexing of your website, including Sitemap submission and reporting.
Price: $0

12) Yahoo! Site Explorer
is Yahoo's version of Google Webmaster Tools. It allows you to explore all the web pages indexed by Yahoo! Search, view the most popular pages from any site, view a comprehensive site map and find pages that link to that site or any page.
Price: $0

13) Ranks.nl
is a keyword density and page prominence indicator. Type in a URL and target keywords to determine the page density and prominence for certain keywords within the page text and/or HTML tags.
Price: $0

14) Rex Swain's Tools
is an independent software developer who has uploaded a range of his custom server tools and demos to his web site. Tools include an RGB color sampler, HTTP Cookie Demo, a HTML sampler and an email form demo.
Price: $0

15) SearchStatus for Firefox
is a toolbar extension for Firefox and Mozilla that allows you to see how any and every website in the world is performing in the search engines.
Price: $0

16) Microsoft Excel
is probably the world's most popular spreadsheet application. Apart from its powerful formulas for financial reporting, Excel charts and spreadsheets are great for site analytics analysis and sharing, sitemap creation, SEO/PPC campaign reporting and tracking link building campaigns.
Price: USD 180.00

17) Google Reader
is a RSS and XML feed reader that constantly checks your favorite news sites and blogs for new content and presents them to you in one interface. It also allows you to share sites/pages of interest with others.
Price: $0

18) Blogger
is a popular online blog provider and templating service owned by Google, where you can quickly set up a blog of your own to post thoughts, interact with people, and more.
Price: $0

19) The Lynx Viewer
developed by YellowPipe allows webmasters to see what their pages will look like when viewed with Lynx, a text-mode web browser. This view is very similar to how search engine robots see your site.
Price: $0

20) Basecamp
is an online collaboration and project management service designed for staff and clients to manage internal and client projects from multiple locations.
Price: Free for 1 project

Ok one more to be cheaky
-------------
21) Cbarker.ws Resonate Equilibrium
Resonate Equilibrium Cbarker.ws Website Validators and Accessibility checkers area. The Website Validators and Accessibility features some of the most well known online validation and conformance tools such as the W3C HTML/XHTML Validator, W3C CSS Validator, CSE HTML Validator, Cynthia and the Watchfire® WebXACT™ Accessibility Checkers.
Price: Free

__________________

sheena

It is a good list of seo tools and I used most of them. Thank you for sharing

Resonate

I tend to shy away from the ones with a cost, i try looking for the best alternative around.

__________________

Trimster

Hey, Resonate! You've done a great job there! Here's one more for you: I use Wrike <*EDIT*> or time saving. They support the GTD idea, that's why I like the tool. It saves me up to 4 hours per week, and that's a lot for me. It means I've got more time to spend with my girlfriend. Check out this post
<*EDIT*>

susu

thx very much 4 ur sharing.

swazi

A great collection, and a very useful one!

sheena

that was a useful collection of tools.