Ask HN: What are the most useful Chrome extensions?

In other words, what are your favorite Chrome extensions and why?

My top 3 most used Chrome extensions to help with productivity and stay focused while coding.

Tabs Outliner | https://chrome.google.com/webstore/detail/tabs-outliner/eggkanocgddhmamlbiijnphhppkpkmkl

Papaly - Bookmarker | https://chrome.google.com/webstore/detail/new-tab-bookmark-speed-di/pdcohkhhjbifkmpakaiopnllnddofbbn

Limitless - Productivity Manager | https://chrome.google.com/webstore/detail/be-limitless/jdpnljppdhjpafeaokemhcggofohekbp

Definitely going to check out Limitless since I'm currently using StayFocused.

1. Adblocker | https://chrome.google.com/webstore/detail/adblock/gighmmpiob...

2. Stayfocused | https://chrome.google.com/webstore/detail/stayfocusd/laankej...

3. Papaly | https://chrome.google.com/webstore/detail/new-tab-bookmark-s...

4. Codota | https://chrome.google.com/webstore/detail/codota/cnpdaoipdfb...

5. ZenHub for GitHub | https://chrome.google.com/webstore/detail/zenhub-for-github/...

I actually have that running on Firefox. For some reason my Chrome had random memory leak spikes from uBlock.

Apologies for the shameless plug, but I've made a Chrome extension which should be useful for anyone learning a foreign language:

Readlang | https://chrome.google.com/webstore/detail/readlang-web-reade...

It allows you to read web-pages in your target language, translate the words and phrases you don't know, and review them all later with flashcards which include some context from the original source.

My adblock is uBlock: https://chrome.google.com/webstore/detail/%C2%B5block/cjpalh...

I also use Ghostery to block more scripts that slow sites down, and to block Google Analytics for my startup (so no faking stats): https://chrome.google.com/webstore/detail/ghostery/mlomiejdf...

I'm also a half marketer, so I use Alexa, Similar Web, Moz toolbar, and Open SEO https://chrome.google.com/webstore/detail/open-seo-statsform...