The Los Angeles Business Journal brings you a weekly roundup of L.A. launches.

Whipclip: Santa Monica’s Whipclip has launched its free iOS app that allows fans to legally create their own video clips of popular television shows and music videos and share them on Facebook, Twitter, Tumblr and Pinterest, as well as over email and SMS. The company, which raised a $20 million Series A round in December from local firms including Greycroft Partners and William Morris Endeavor, has formed partnerships with networks including Comedy Central, ABC, CBS and Fox, as well as major music companies including Universal Music Group and Sony Music.

Cover: New York’s Cover, an app that lets restaurant diners split the bill and add a tip with a stored credit card or via Apple Pay, has now partnered with 26 high-end restaurants in Los Angeles. Some of the eateries using the service include Republique in Mid-Wilshire, 41 Ocean in Santa Monica and Cliff’s Edge in Silver Lake.

Zig Zag Zoom: A new mobile game publisher called Zig Zag Zoom has launched in Los Angeles. Founded by a team of game makers with experience at Disney Interactive, EA, Activision, Konami and Nintendo, the company has a platform that allows players to support a variety of environmental causes and organizations during game play. For example, players of a virtual pet game called Tree Story nurture seedlings into fully grown trees. When those pet trees are sent to virtual forests within the game, real-world trees get planted.

Wonolo: San Francisco’s Wonolo (which stands for “Work now locally”), has expanded its on-demand staffing service to Los Angeles. Companies can use Wonolo’s online platform to immediately bring in vetted and insured temporary workers. The company declined to disclose specific L.A. customers, but it focuses on the e-commerce, events, retail, hospitality and entertainment sectors.