$ otool -L BBEdit | sed 's#.*/\(.*\) (.\*#\1#' BBEdit (architecture x86_64): libz.1.dylib libbz2.1.0.dylib Accelerate AppKit CrashReporter ApplicationServices

$ otool -L BBEdit | sed 's#.*/\(.*\) (.\*#\1#' BBEdit (architecture x86_64): libz.1.dylib libbz2.1.0.dylib Accelerate AppKit CrashReporter ApplicationServices AudioToolbox Automator Carbon CoreAudio Quartz DiskArbitration Intents IOKit QuickLook Security SystemConfiguration UserNotifications WebKit CandiedYams Titlecase UpdateKit Foundation libobjc.A.dylib libc++.1.dylib libSystem.B.dylib CFNetwork CoreFoundation CoreGraphics CoreServices CoreText ImageIO QuartzCore Looks like Objective-C, C++, AppKit, some other bits and pieces. QuartzCore has Core Animation in it which can either be used to create flashy animations or be used to create some very solid, high-performance text views (if that’s how you use it).