Mountain View-based Appcelerator said earlier this week that it has acquired Nodeable, which develops software for real-time processing of data for big data applications. Financial terms of the buy were not disclosed. Nodeable was venture backed by True Ventures, and was based in San Francisco. The firm's founders were Dave Rosenberg and Mark Griffin. Appcelerator said the acquisition is the fourth in two years for the company. Appcelerator is venture backed by Mayfield Fund, Translink Capital, Red Hat, eBay, Sierra Ventures, and Storm Ventures.