All of the custom pollers are user-contributed. I try and maintain them but very short of time at the mo.
Alamy, stockfresh and canstock work for me, but it sometimes needs you to login to each site and manually refresh the pollers (the refresh button on the left) and can also depend on your language version of their site that you use.
If you know a little about regular expressions (some great tutorials on youtube) though you can build your own for your version of each site. Hit the 'Edit' button for a custom poller to see how they're built and use similar settings for your own pollers for any site you like (I have my own for gmail, for facebook notifications, for monitoring picWorkflow, and tons of other sites)

http://www.stocksy.com/

Afaik there is nothing exactly like the picNiche toolbar for Chrome. I considered building one, but because they don't allow custom toolbars and the popup panels execute in a confined memory-space it's not really practical. I am planning a complete redesign and rebuild for Chrome and Firefox but hard to find the time as I'm too busy with picWorkflow at the moment.

There are several similar tools for Android (search the store for microstock) and I think one for iPhone but the closest thing to the picNiche earnings display for Chrome currently available is Stock Performer's website (they have a Chrome addon to gather the data, then display it on their site).

Because of the nature of the system (crowd-sourced with QA being long-tail based), both the time taken to keyword each image (even on average) and the types of keywords used tends to vary based on a few things:
1) The chosen payment level
2) The chosen number of keywords
3) The quality and clarity of the image-content to be keyworded
4) The keyworder's 'style', both in word use, and UI use

Some detailed info here:
http://picworkflow.com/blog/research/how-long-does-image-keywording-take-on-picworkflow/

Need 3 more keyworders/captioners again

Some technical input since I already work in this space... I've toyed with this idea in the past (still loosely am considering something similar for picWorkflow), and everytime I've tried to come up with a way to do it, I run into the following issues:

1) Technically, regularly pulling data from and maintaining changing data, across a wide variety of sites (hundreds at-least to be financially viable) is very VERY difficult. I have a couple of tools which pull complex data from just 13 microstock sites and simple data from 40+, and both are an absolute nightmare to maintain.

2) To perform step 1, costs money, as the OP suggested 'no fees', but then states a small annual fee for upkeep, presumably thinking of server-costs, would leave little-to-no development or marketing budget.

3) Storing images would be essential, as if any source site went down, the image-buyer would still need access to thumbnails, and not-caching those would be a big error because of any inconsistencies in the source data leading to unpresentable search results.

4) The site to be viable would probably work best if it took a cut of every sale (which other similar services have done), but then the participating artists would figure "hey, people are buying my images, why am I paying 20% to this middleman service now I have the customers", thus making the need for it to be an end-to-end, not just a referral service.

5) Maintaining relationships with that many artists and supporting both userbases (artists and buyers), and that many sites, would again be a total nightmare.

6) The issue of who handles payments is tricky, the buyers want a single-point service, but the OP suggests artists handling payments.
From my research 2 things buyers want above all else are:
a) A good search engine, with a useful relevance algorithm so they spend less time searching (hard to do).
b) A fast, simple and transparent payment structure with no hoop-jumping.

My solution:

1) Photoshelter already does a good job of providing a network of sites for selling your work, if you don't like microstock, sell from your own site and spend a few bucks (on Fiverr if you're cheap, on odesk/freelancer if you have a couple of hundred to spare) on content marketing people (pickup some link builders (white-hat only) and content writers/enrichers, and actually add some web-friendly content around your images).

2) Don't like agencies that keep 80% plus of the income? Easy... Don't sell through them. Plenty of people will, but vote with your feet and the agencies will listen if enough people do so.

Not a full-service solution, but just my 2c, gave me an idea for a blog post though too, thanks
Bob

Sorry didn't see this earlier, seem to no-longer get notification emails for this board. You found the right solution though, thanks

Is your own keywording an indication of the standards required?

Not even remotely My own portfolio hasn't been added to since well before I started picWorkflow, have been too busy
A lot of my very early images were lazily keyworded using Yuri's keywording tool, so I know they're really terrible and have a lot of irrelevant (or only loosely related) keywords.

I had most of my portfolio keyword-audited when I cleaned it out and distributed to 6 of the newest agencies, but all my old images on the big-5 agencies are pretty poor quality keywords by comparison. A description of my updated workflow post-picWorkflow can be found here:
http://picworkflow.com/blog/microstock/spring-cleaning-my-microstock-portfolio/

The last time this came up on here (a week or two back) I asked why some/most/all? the agencies strip out our copyright line from the EXIF data: thus rendering them orphan works as soon as they're out there on a legal buyer's website, without any thief even having to know how to do it.
No answer was the loud reply.

I discuss that quite in-depth here: http://picworkflow.com/blog/research/do-microstock-agencies-violate-photographers-dmca-copyright

Very interesting thread. Would love to hear more about people's workflow

I use Lightroom for the initial selection process, then upload to picWorkflow (I own that site btw).
I don't usually post links to the site in here but in this case I think it's relevant because I recently wrote a pretty detailed blog post on how I select and organise my images as part of a portfolio spring-cleaning, I think it may be useful to you.

I understand that all images shot on a phone will only be accepted under our Exclusive Content Supply Agreement.
I understand that all images are submitted non-exclusively except images shot on a phone.

I'm in favour of this model (actually discussed it at the last couple of conferences as I was considering setting up a mobile-focussed market myself).

The agreement indicates quite clearly where their priorities lie, and that's in creating a collection of content-focussed images without too much regard to 'perfect' technical detail. Especially with the rising fashion for 'instagram' effect photos regardless of their complete lack of artistic value in the eyes of 'real' photographers, there's a rock-solid market here which (potentially at least) can open up a new market for imagery without (for once) cutting into the existing market.

It of course remains to be seen whether there's 'real' revenue there but I'm (cautiously) optimistic, I just wish they had a referral programme so I could write them some mobile apps and nab an extra slice of the cake from the other side

For anyone not familiar with it, info is here: http://www.picworkflow.com/lightroom/

Recruiting again if anyone is looking for work keywording images