Sergey Chernyshev 
ShowSlow
ShowSlow is a tool for aggregating and visualizing web site performance information. It is also available as open source tool.Sharing Buttons
I created an open catalog of sharing buttons so everyone can implement their own version based on the collected data. It's based on wiki technology and uses Semantic MediaWiki to manage structured data.Technical Presentations
- TechPresentations - collection of interesting technical presentations. Feel free to register and add/edit presentations.
- TechPresentations blog - original blog that was an initial version of the project and still used as feed for for the project.
Meetups
I've organized New York Web Performance Workshop meetup - you can check meeting schedule over at Meetup.com.
I'm also a member of a few other meetups in New York
Maps
- Google maps vs. Yahoo! maps - side-by-side comparison tool.
- Map banners - AJAX ads (heavy page).
JavaScript
- JSON Remote Loader - Open Source library for loading JSON-formatted data from remote sites (where XMLHttpRequest doesn't work because of same-host security restriction).
Feeds
- Feed Friends - my social news sharing project. You can see news I shared on my Feed Friends page.
Facebook apps
- Friends Explorer - my first Facebook app showing birthdays of your friends on a timeline. page.
Open Source
- A few extensions for MediaWiki
- I also host open MediaWiki Widget catalog and authored a few widgets myself
- My OHLOH profile - social network for Open Source developers
- My Open Source projects on Google project hosting
- My Perl modules on CPAN