The world's most popular userscript manager

LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device.

Improve your writing with Grammarly's communication assistance—including spell check, grammar check, punctuation check, and more.

A companion for students and teachers that extends the Clever Portal

5 STAR Adblocker with the most complete adblocker filterlists for you. Install now and never see and ad again. Free.

Quick overview of your Google Calendar with one-click access to locations & documents

Master touch typing using this free game / educational program. This online program will assist you with learning and improving…

Kami is an interactive learning platform empowering students and enhancing the way teachers teach, feedback, and assess.

捕捉网页截图，编辑并将它们保存为PDF，JPEG，GIF，PNG或BMP；上传，打印，在Photoshop中打开，复制到剪贴板或电子邮件

Check for better prices on Amazon while browsing ebay & other online stores

Amplify sound volume by up to 500%

当浏览器关闭时，这款应用程序删除你的浏览历史,防止他人跟踪你的网上活动。

方便、快捷地将参考文献和PDF导入到Mendeley 引文管理工具库

A simple extension that allows you to schedule Jitsi Meetings and stream your desktop into Jitsi conferences.

Learn languages completely free, without ads or hidden charges. It's fun, easy, and scientifically proven.

Volume Booster - amplify volume up to x5

Securely edit, fax and sign PDF and Word documents for free. Fill forms. Merge documents and reorder pages. Create templates.

CK-12 is an app to help students, and teachers improve K-12 learning globally by providing self-pace learning content & tools.

Never Overpay Again! Piggy adds the best Coupons & Cash Back when you shop online.

Make your computer run smoothly by suspending the tabs you aren't using

YouTube Adblocker removes all ads: pre-roll video ads, text & banner ads. Save time by stopping those useless advertisements.

Your thoughts in words.

The most beautiful and customizable JSON/JSONP highlighter that your eyes have ever seen. Open source at https://goo.gl/fmphc7

Keyword search volume, cpc and competition for 15+ websites like Google™ Search Console, YouTube™, Amazon™ & more

Take selfies with your camera using over 80 free fun effects. Save photos to your computer, or share online.

Improving Steam. Items auto-selling. Lowest prices for games and items. Prices from different sources. And a lot more

Play over 50 levels of box-jumping madness! Design and share your own levels.

Produce music online with builtin synthesizers, drum machines, effects and samples.

Quizlet makes simple tools that let you study anything, for free

A simple but addictive game. Start with four basic items and use them to find dinosaurs, unicorns and spaceships!