NSFileManager category for getting a list of all applications

gistfile1.m

#import <Foundation/Foundation.h>

@interface NSFileManager (ApplicationList)
-(NSArray *)applicationList;
@end

gistfile2.m

#import "NSFileManager+ApplicationList.h"

@implementation NSFileManager (ApplicationList)

-(NSArray *)applicationList {
	NSMutableArray *applications = NSMutableArray.new;
	NSArray *array = NSSearchPathForDirectoriesInDomains(NSAllApplicationsDirectory,  NSAllDomainsMask, TRUE);
	for (NSString *path in array)
		[applications addObjectsFromArray:[self applicationsInDirectory:path]];
	return applications;
}

-(NSArray *)applicationsInDirectory:(NSString *)directory {
	NSMutableArray *array = NSMutableArray.new;
	NSError *error = nil;
	for (NSString *path in [self contentsOfDirectoryAtPath:directory error:&error]) {
		if (error != nil) {
			NSLog(@"Error found when grabbing list of applications: %@", error);
			return array;
		}
		if ([path hasSuffix:@".app"]) {
			[array addObject:path];
			continue;
		}
		BOOL isDirectory;
		if ([self fileExistsAtPath:path isDirectory:&isDirectory] && isDirectory)
			[array addObjectsFromArray:[self applicationsInDirectory:path]];
	}
	return array;
}

@end