The largest single accelerator program in the US, Y Combinator, is holding its demo day today. For a few minutes, each company will take the stage to try to woo the press and investors alike.

Of course, we being the startup-crazy folks that we are here at TNW, we have the full list for you. So, here’s your rundown, but it’s worth noting that a couple of them are not yet included as they are listed as “off the record”. We’ll give you the scoop as soon as we can.

Aisle 50 – A Groupon for groceries, headed by Chris Steiner, Riley Scott and George Kosnick

Interstate – Roadmapped development for business that makes it easy to share and track what’s happening. Simon Fletcher and Greg Cooper are at the helm.

MixRank – A company hoping to bring “competitive intelligence” to online advertising, via Scott Milliken and Ilya Lichtenstein.

screen shot 2011 08 16 at 5 29 59 pm 220x83 Were at YC Demo Day   Meet the latest class of startupsPicplum – Automatic sending of printed photos. For more information, make sure to catch Chikodi Chima’s piece about Picplum on TNW apps.

Launchpad Toys: Building toys that empower kids to learn, create and share ideas. Founded by Andy Russell and Thushan Amarasiriwardena.

Interviewstreet: Interviewstreet helps companies hire the best programmers. Founded by Vivek Ravisankar and Harishankaran

Debteye: “Turbo tax for deb relief” – Helping customers to automate debt counseling and get special payment arrangements. Founders are John Sun, Paul Zhang and Kevin Yu.

DoubleRecall: A form of brand advertising for Web and mobile that promises 12x more money for publishers compared to classic banners. Robert Farazin, Rok Gergoric and Rok Krulec are the founders.

Envolve: A customizable chat system for your website, from James Tampin and Andrew Lee

Quartzy: $99 billion is spent on consumables from life science labs each year. Quartzy is a free inventory and ordering software to break the industry away from Excel files. Founded by Jayant Kulkami and Adam Regelmann.

Munch On Me: It “connects people with great dishes at great prices” In short, a daily deals for food from Jason Wang, Richard Din and Tony Li.

Paperlinks: Paperlinks is the QR code infrastructure for businesses, from Hamilton Chan.

PageLever: Facebook analytics that are unlike anything you’ve seen before. Here’s our full review.

Screen Shot 2011 08 03 at 6.37 Were at YC Demo Day   Meet the latest class of startups

MarketBrief: Marketbrief takes SEC filings and puts them through a system of humans and computers to create an easy to understand article containing all important information from the filing. Founded by Jason Zucchetto, Chris Auer and Mike Shafrir.

Snapjoy: Snapjoy stores and organizes the world’s photos, a direct competitor to Flickr from Michael Dwan and JP Ren.

Opez: Yelp for individual service professionals from Chris Tam and Paul Chou.

Bushido: A hosted ecosystem and app store for web apps from Sean Grove and Kevin Zettler.

Stypi: Stypi is Google Wave done right. If they’re right, it could be huge. From Jason Chen and Byron Milligan.

Screen Shot 2011 08 23 at 3.44.52 PM 520x116 Were at YC Demo Day   Meet the latest class of startups

Proxino: Proxino is a cloud platform that makes it easy to debug and deploy JavaScript code by Muzzammil Zaveri and Ethan Fast.

MongoHQ: MongoHQ allows you to quickly and easily create MongoDB databases for use in your applications. Founders are Jason McCay and Ben Wyrosdick

Parse: Heroku for mobile – power your mobile apps with our cloud platform. Add a backend to your mobile app without servers. By Tikhon Bernstam, Kevin Lacker and Ilya Sukhar.

Science Exchange: Science Exchange is an online marketplace for outsourcing science experiments. No more bad volcanos, if Dan Knox, Elizabeth Ioms and Ryan Abbott have their way.

Verbling: Connect language learners to native speakers for verbal practice through in-browser, real-time live video. If you’re learning Spanish, we’ll connect you to an Argentine who’s learning English, for example. Jake Jolis, Mikael Bernstein and Fred Wulff want you to speak the world’s languages.

MobileWorks: MobileWorks is crowdsourcing, reinvented. Businesses can outsource work to our crowd in 3 clicks and developers can add human intelligence to their applications. From founders Anand Kulkami, David Rolnitzky and Philipp Gutheim.

Screen Shot 2011 08 18 at 4.22 220x103 Were at YC Demo Day   Meet the latest class of startupsVidyard: YouTube for Business is the short way to put it. The better way is described in our review.

Tagstand: NFC platform that makes it easy for developers and businesses to incorporate near field communication into their apps from Kulveer Taggar, Srini Panguluri and Omar Seyal.

Kicksend: Realtime file sharing and delivery for friends and family by Pradeep Elankumaran and Brendan Lim.

Vimessa: Video voicemail – the ease of SMS with the magic of video from Peter Clark and Cesar Alaniz.

Can’tWait!: We use trailers to get users to tell us what upcoming media releases they want to watch or buy, and then sell it to them when the media is released by Eric Florenzano and Eric Maguire.

Codecademy: Codecademy is the easiest way to learn how to code. It’s interactive, fun, and you can do it with your friends says founders Zach Sims and Ryan Bubinski.