It will be all collaborative soon (like Google docs), so please bear with me.
There are 3 main use cases I have in mind:
1. Making and sharing useful data sets and working on them collaboratively. People use Google docs for it right now, but it's nearly impossible to find sheets unless you already know about them. Also, Gdocs looks clunky.
2. Self-tracking, especially on mobile - I've tried lots of apps and always find myself going back to a spreadsheet for its flexibility. But spreadsheet apps on mobile suck big time. So I'm fixing that.
3. Business data dashboards - There are tons of dashboard apps out there. But people still copy and paste numbers into Excel. Again - because it's flexible. So, I'm building the dashboard itself in the form of a spreadsheet.
It's only a web app right now, but I'll soon be making mobile apps.
If you're interested, please sign up for the mailing list and I'll let you know when it's ready for you to use.
* tracks read/unread status at individual item level
* keyboard-driven navigation (sadly, as far as I can tell, only Google really gets it here)
* unlimited or large limit on items per feed (some only allow 10 articles, which makes it impossible to read hacker news, for example)
* standalone accounts (google or facebook login not required)
Some things to consider for the chart:
1) Include a date. That allows people who find the chart to know how up to date the chart is.
2) Include more information. Things like whether it's a standalone software (and what OSs it runs on) or a web service; what licence it uses; if there's a cost; if there are any social features (because being shown what some other people thought was great was useful.); if there are any sync features (so I can read my feed on my phone and laptop and desktop);
But these are just polite suggestions! Feel free to ignore them.
It's only a web app right now, but I'll be releasing mobile apps shortly. I've added a few more details in my other comment.
Sorry, it's really meant to be collaborative, so that anyone can make changes. I just launched it in a hurry to stop avoiding launching :-D
It's a table. You need to have a graphical element for this to be considered a chart.
I was amongst many it seems who were discombobulated when we arrived at the site. I was wondering whether the chart was in flash or something had not loaded. And I felt very let down and negative about the table, as I was expecting some sort of x/y bubble chart, where the bubbles showed the number of users and the x/y axes showing something like usability and feature-set. Now that or similar would be a chart worth looking at.
Also, bubble charts and more are coming to the site, so thanks for a great idea for a chart!