Gill, TimAt 10.2 percent, the national unemployment rate is at a 26-year high, The New York Times points out. At least Quark Incorporated, founded by Denver businessman, philanthropist, and political activist Tim Gill in the early 1980s, seems unaffected. The company, which created perhaps the most popular computer software for laying out newspapers and magazines long before Adobe ended the era of paste-up design, could add as many as 500 jobs to Denver in the next three to five years, according to the Denver Business Journal. Quark is launching Quark Promote, which could become its “most profitable line of business yet,” the company says. The new development aims to help small businesses and individuals create marketing materials, according to The Denver Post, noting the company will release more details on November 19. Earlier this year, Quark had roughly 135 employees.