The 13 most controversial apps you can still download today - from ISIS to racists

Yik Yak is a popular anonymous bulletin board of sorts where people can post what's going on around them without worrying people discovering who they are. Of course, the anonymous nature of the app has led to some abusing the app and cyberbullying, including a run of recent racist postings around university campuses.

Price: Free (iOS, Android)

The League is a selective dating app that only allows certain users in. Most of its users are wealthy or attended Ivy League schools, and you only get access if the app's algorithm decides you're cool and successful enough.

Price: Free (iOS)

Ever since Apple decided to allow "ad blockers" on iPhones, a debate has continued about whether they are ethical. These apps let people block ads on Apple's mobile web browser. Opponents say giving people this power is destructive to websites that rely on advertising revenue to stay in business, while supporters say the apps fix a fundamentally broken mobile web experience.

Price: Free, with $2.99 "Pro" version (iOS)

Ashley Madison encourages its married users to cheat, allowing people to search for married people nearby who are also looking for a fling. It burst into the national spotlight earlier this year when 32 million of its accounts were compromised by hackers, starting a lot of uncomfortable conversations between would-be cheaters and their spouses.

Price: Free (iOS, Android)

Apple removed the Wikileaks app from the App Store, but you can download aversion of the app on Google Play (though it hasn't been updated in years). The app lets you browse and dive into Wikileaks' treasure trove of leaked documents.

Price: Free (Android)

Lulu is an app that lets women anonymously rate and objectify men without their consent. The app gives women the chance to rate men they know through Facebook on a scale of 1 to 10, and it encourages hashtags such as #Big Feet and #NapoleanComplex.

Price: Free (iOS, Android)

Luxy originally called itself "Tinder, minus the poor people," but now describes itself as "an online millionaires club" that's "exclusively for the 1%." You can swipe to find matches and even see if other users like the same fashion brands.

Price: Free (iOS, Android)

Weed Farmer tasks you with running your own cannabis farm as you grow and sell pot in an attempt to become a successful marijuana farmer. The game reached the top of the App Store shortly after its launch.

Price: $2.99 (iOS), $0.99 (Android)

SkinneePix is an app that edits your selfies so that you'll look thinner. You can choose to virtually lose 5, 10, or 15 pounds in only a few taps.

Price: Free (iOS, Android)

After School is an app designed to give high school students a place to discuss things anonymously without worrying about a teacher or parent finding out. It was pulled from the App Store after kids started using it for bullying, but After School has since returned with new safety features.

Price: Free (iOS)

Whisper is one of the most popular platforms for people to share gossip, secrets, and sometimes even news scoops anonymously. You can also browse secrets that were posted nearby you or at your school.

Price: Free (iOS, Android)

Tinder blazed the trail for people to hook up based solely on looks alone. It used to only show you the photos and first name of other users, but now lets you add your job and education. However, the core experience is still swiping left and right until you find a match that also found you attractive.

Price: Free (iOS, Android)

This post is an update of a previous one by Steven Tweedie.