As Android's official app provider, the Google Play Store is packed with thousands of useful programs. But Google's terms of service is extremely restrictive, which means that countless apps simply don't qualify to be hosted on the Google Play Store. As a result, many great apps are relegated to random third-party app stores and strewn about the internet, making them really hard to find. So below, we'll go over 10 of our favorite non-Play apps, and if you see anything that piques your interest, just make sure to enable "Unknown sources" before you download and install the APK. Don't Miss: The Best Cross-Platform Apps for Android & iOS

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#1 - PS4 Remote Play Sony has an awesome app called PS4 Remote Play that allows users to play their favorite PlayStation 4 games on their Android devices—but the trouble is, the app is exclusive to Sony's Xperia line of smartphones. Luckily, though, developer Twisted89 has ported the PS4 Remote Play app to work on any Android device, which means that even if you don't own an Xperia, you can now play your own PS4 games right on your smartphone or tablet. Download PS4 Remote Play here (.apk) Don't Miss: Our full set-up guide for PS4 Remote Play

#2 - CyanogenMod Gallery Prior to the introduction of Google Photos, Android's stock Gallery app was simple, intuitive, and most importantly, sported a dark theme. Now it's an eye-burning white and prioritizes cloud sync above all else, so if you yearn for the simpler days of a gallery app that just displays photos, try CyanogenMod Gallery. It's an updated version of the old AOSP Gallery app, and it has all the features you actually use without any additional clutter. Download the CyanogenMod Gallery app here (.apk) Don't Miss: Our full set-up guide for CyanogenMod Gallery

#4 - BlackBerry Launcher BlackBerry has released their first Android smartphone called the Priv, and it finally seems to be reviving the once-revered brand. But ditching their proprietary operating system to go with Android meant that BlackBerry had to create a few apps of its own, and the best one so far is their new launcher. This home screen replacement app can give you a bit of BlackBerry flair on any Android device, and there are even some companion apps available at the setup guide below. Download the BlackBerry Launcher app here (.apk) Don't Miss: Our full set-up guide for all of Blackberry's ported apps

#5 - Amazon Underground Amazon has long maintained its own third-party Android app store, but recently, they've rolled this and most of their other services into a single app called Amazon Underground. There are daily app giveaways and you can download thousands of Android apps at discounted prices, plus you can still do your online shopping and access Amazon Instant Video, as well as other popular Amazon services. Download Amazon Underground here (.apk) Don't Miss: Our full set-up guide for Amazon Underground

#7 - AdAway (Root Required) If the internet is the information superhighway, then ads are the giant billboards that line the shoulders. So if you don't want your virtual world to look like L.A. or Houston, consider implementing some zoning laws with AdAway. This root app can get rid of all ads in apps and websites with one simple tap, and it offers regular updates to the blocking list, which means you'll likely never see another ad again. Download AdAway here (.apk) Don't Miss: Our full set-up guide for AdAway

#8 - Notifications Logger If you've ever accidentally dismissed a notification before you got a chance to read it, you know how frustrating it can be to dig through apps to find the missing message. Instead of bothering with all of that, just install Notifications Logger—as its name would suggest, the app keeps a detailed running log of all past notifications, and you can even export your notifications to be viewed on a different device or custom ROM. Download Notifications Logger here (.apk) Don't Miss: Our full set-up guide for Notifications Logger

#9 - Echo The real world doesn't come with a DVR feature, but there are definitely times when instant replay would come in handy. Echo, a free open-source app from developer Marek Rogalowski, keeps a rolling recording of all ambient audio within earshot of your phone, so you can always play back anything you just heard. Technically, Echo is available on Google Play, but that version has been abandoned, so you'll only find the latest version on the F-Droid Repository. Download Echo here (.apk) Don't Miss: Our full installation and set-up guide for Echo