Scripting languages are used by 56% of developers today, and while more than half of those developers use scripts less than 20% of the time, both the total number of developers using scripting languages and the amount of time spent is expected to increase during the coming year, Evans Data reports. Linux was strong for both target and platform with PHP and Ruby users. 54% of developers write multi-threaded applications. The primary perceived obstacle to multi-core development is the complexity of parallel programming, followed by a lack of available tools. 51% of North American developers use agile development techniques some part of the time, and that share is expected to increase in 2008.