Looking for good software & technology conferences in 2013? I did a bit of scrounging around, talked with some colleagues, and came up with this big list of 2013 dev conferences, ordered by date.
- W3Conf       
 February 21-22
 San Francisco, California
 The W3C’s annual conference for web professionals. Latest news on HTML5, CSS, and the open web platform.
- Web Summit        
 March 1st
 London, Great Britain
 "Our events focus on giving attendees an incredible experience with a mix of world-leading speakers, buzzing exhibitions and effective, deal-making networking opportunities. Our illustrious list of past speakers includes the founders of Twitter, YouTube, Skype and over 200 international entrepreneurs, investors and influencers."
- MX 2013          
 March 3-4
 San Francisco, California
 UX and UI conference. “Managing Experience is a conference for leaders guiding better user experiences”
- SXSW Interactive       
 March 8-12
 Austin, Texas
 "The 2013 SXSW® Interactive Festival will feature five days of compelling presentations from the brightest minds in emerging technology, scores of exciting networking events hosted by industry leaders, the SXSW Trade Show and an unbeatable lineup of special programs showcasing the best new digital works, video games and innovative ideas the international community has to offer. Join us for the most energetic, inspiring and creative event of the year."
- Microsoft VSLive Vegas        
 March 25-29
 Las Vegas, Nevada
 .NET developer conference. “Celebrating 20 years of education and training for the developer community, Visual Studio Live! is back in Vegas, March 25-29, to offer five days of sessions, workshops and networking events – all designed to make you a more valuable part of your company’s development team.”
- anglebrackets        
 April 8-11
 Las Vegas, Nevada
 anglebrackets is a conference for lovers of the web. We believe that the web is best when it’s open and collaborative. We believe in the power of JavaScript and expressiveness of CSS the lightness of HTML. We love interoperability and believe that the best solution is often a hybrid solution that brings together multiple trusted solutions in a clean and clear way. We love the expressiveness of language, both spoken and coded. We believe that sometimes the most fun at a conference happens in the whitespace between conference sessions. More details at Hanselman’s blog.
- Dev Intersection, SQL Intersection        
 April 8-11
 MGM Grand, Las Vegas, Nevada
 Visual Studio, ASP.NET, HTML5, Mobile, Windows Azure, SQL Server conference. Focused on .NET and SQL developers.
- TechCruch Disrupt       
 April 27th-May 1st
 New York City, New York
 Technology and startups conference.
- Microsoft VSLive Chicago       
 May 13-16
 Chicago, Illinois
 .NET developer conference
- Google I/O       
 May 15-17
 Registration opens March 13th at 7am.
 San Francisco, California
 Probably the most anticipated developer conference in the world. Expecting some news on Google Glass, perhaps some haptics support in Droid devices, maybe a bit on self-driving cars…what’s not to love?Registration to be opened up early February. Tickets usually sell out immediately.
- GlueCon       
 May 22nd-23rd
 Denver Colorado
 "Cloud, Mobile, APIs, Big Data — all of the converging, important trends in technology today share one thing in common: developers. Developers are the vanguard. Developers are building in the cloud, building mobile applications, utilizing and building APIs, and working with big data. At the end of the day, developers are the core."
- Microsoft TechEd       
 June 3-6
 New Orleans, Louisiana
 Longstanding Microsoft developer and technology conference.
- Mobile Conference       
 June 6-7
 Amsterdam, The Netherlands
 Conference for mobile devs, focusing on the future of mobile app development.
- WWDC       
 June 10-14
 Apple’s highly-anticipated Worldwide Developer Conference. Tickets go on sale April 25th.
- Norwegian Developer Conference (NDC)       
 June 12-14
 Oslo, Norway
 Huge developer conference featuring some of the biggest speakers in software, including Jon Skeet, Scott Meyers, Don Syme, Scott Allen, and Scott Guthrie.
- Microsoft BUILD       
 June 26-28
 San Francisco, California
 Microsoft’s one big Windows developer event. All the big Microsoft names –from Guthrie, to Hejlsberg, to Hanselman — will be there. Expect great technical presentations, tablet giveaways, and an all-hands-on-deck Microsoft powerhouse conference.
- SIGGRAPH 2013       
 July 21-25
 Anaheim, California
 40th international conference and exhibition on computer graphics and interactive techniques. Graphics, mobile, art, animation, simulations, gaming, science.
- OSCON       
 July 22-26
 Portland, Oregon
 Biggest open source technology conference.
- ThatConference       
 August 12-14th, 2013
 Kalahari Resort, Wisconsin Dells, WI
 Spend 3 days, with 1000 of your fellow campers in 150 sessions geeking out on everything Mobile, Web and Cloud at a giant waterpark.
- <anglebrackets>       
 October 27th – 30th
 MGM Grand, Las Vegas, Nevada
 Hosted by renowned developer and speaker Scott Hanselman, <anglebrackets> is a conference for lovers of the web. We believe that the web is best when it’s open and collaborative. We believe in the power of JavaScript and expressiveness of CSS the lightness of HTML. We love interoperability and believe that the best solution is often a hybrid solution that brings together multiple trusted solutions in a clean and clear way. We love the expressiveness of language, both spoken and coded. We believe that sometimes the most fun at a conference happens in the whitespace between conference sessions.Author’s note: I attended the spring <anglebrackets> in April, and it was positively fantastic. Highly recommend this conference. 
- DevConnections and WinConnections       
 Week of November 18
 Mandalay Bay, Las Vegas, Nevada
 Microsoft developer event
If you’re into futurism and technology evolution, The Singularity Summit might be for you, with speakers like Ray Kurzweil and Peter Norvig. The dates for 2013 are yet unannounced.
As for me, I’m headed to anglebrackets/DevIntersection in April. This dual conference will host speakers like Scott Hanselman, Phil Haack, Damian Edwards, Elijah Manor, Christian Heilmann. Should be a blast!
Know any good conferences not listed here? Let me know in the comments.