Lynda.com uses a variety of screen recording and editing software to create their instructional screen casts. Some of the common tools used for screen recording include:

• Camtasia - One of the most popular screen recording and video editing tools used by individuals and companies like Lynda. It allows recording on-screen actions, editing, and exporting high-quality video tutorials.
• ScreenFlow - Another professional screen recorder and video editor for Mac made by Telestream. Has options for recording screen, webcam, audio, and annotations.
• Adobe Captivate - Part of Adobe's elearning toolkit, Captivate is used for software simulations and interactive video tutorials. Good for rapid elearning content creation.
• ActivePresenter - A cheaper alternative to Camtasia with features for recording screen, editing, quizzing, and publishing videos.
• Screencast-O-Matic - A simple free tool for basic screen recording and video creation. Limited editing capabilities.
• FlashGet Cast - A video publishing and sharing platform that allows instant screen recording with audio. Allows hosting the videos online and export to YouTube.

The choice depends on budget, features needed and platform (Mac vs PC). For professional, full-featured software like Lynda uses, tools like Camtasia, ScreenFlow or Adobe Captivate work well. Free web-based apps can also suffice for simple screen recordings. The key is choosing a tool that makes it easy to record, edit and share educational screen casts.