London - Zemanta, a provider of multimedia tools for bloggers, has raised $650,000 in seed funding from Union Square Ventures, TechCrunch reported.

New York - Clickable, an online advertising start-up, announced on Wednesday that it has closed a $14.5 million second round of financing, led by Founders Fund with participation from previous backers Union Square Ventures and FirstMark Capital.

New York - Meetup, an online social network that helps grassroots groups organize and create real-world events, announced on Wednesday that it has received an investment from Union Square Ventures.

Hoboken, N.J. - Pinch Media, a provider of free tools for developers creating applications for Apple's iPhone, has raised an undisclosed sum of seed funding, PEHub.com reported.

Los Angeles - Twitter, a microblogging service, has raised $15 million in its second round of venture capital financing at a pre-money valuation of around $80 million, GigaOM reported.

Brooklyn, N.Y. - Outside.in, the provider of a Web platform for neighborhood news and social networking, has raised $3 million in a round of venture capital, which included investments from Union Square Ventures, Milestone Venture Partners, New York City Investment Fund, Betaworks, and a group of angel investors led by George Crowley.

New York, N.Y. - TargetSpot, a New York-based advertising marketplace specifically designed for streaming audio, has raised $8.6 million in its second round of venture capital, led by Bain Capital Ventures.

San Francisco - Zynga, a developer of online casual games designed for play on social networking sites, has raised $10 million in its first round of funding, led by Union Square Ventures, The New York Times reported.

New York - Clickable, a Web-based service for creating and managing online advertising campaigns, on Monday announced that it has raised $6 million in its first round of venture capital, led by Pequot Ventures and Union Square Ventures.

New York - Tumblr, the developer of an online scrapbooking service, has raised $750,000 in first round finding from Spark Capital and Union Square Ventures, PEHub.com reported, citing a regulatory filing.

Brooklyn, N.Y. - Outside.in, a network of neighborhood and local news sites and blogs, has raised $1.5 million in its second round of funding, from returning backers including Union Square Ventures, Milestone Ventures, Village Ventures and individual angel investors, PEHub.com reported.

San Francisco - Twitter, a social networking and blogging service that uses mobile phones, instant messaging and e-mail, said that it has raised an undisclosed sum in funding, from Union Square Ventures, Charles River Ventures, and angel investors including Marc Andreessen, Dick Costolo, Ron Conway and Naval Ravikant.

New York - Clickable, a provider of a Web-based service where online advertisers can manage their search marketing campaigns, has raised $3 million in its first round of venture capital financing, co-led by Union Square Ventures and Pequot Ventures.

New York - TargetSpot, a provider of ad serving technology and a marketplace for advertisers and Internet broadcasters, announced on Tuesday that it has received investments from Union Square Ventures, CBS Radio and Oddcast, and named co-founder Doug Perlson as its CEO.

Brooklyn, N.Y. - Outside.in, a site that aggregates "hyperlocal" websites and blogs for users, has raised $900,000 in its first round of financing, led by Union Square Ventures.