Refined Twitter improves the Twitter experience by removing cruft and adding useful features.
Available for Chrome, Firefox, Opera.
Some of the best features are: Embedding linked Instagram photos directly in the tweet, syntax highlighting of code blocks, auto-loads new tweets in the stream if you're scrolled to the top, removes promoted tweets.
You can go from light to dark as effortlessly as clicking an on-screen button, change tint hues to match any outfit, or cycle through your timelines with your keyboard. It's the same old Twitter, but with a fresh new coat of paint.
Stack is a mac application for all your social media web apps.
The main purpose of Twizzy is to be a standalone messenger for Twitter. You can use it in collapsed or expanded mode. It supports everything that messages on Twitter support: gifs, images, stickers, etc. You can also send tweets directly from the menu bar. You can attach images, gifs, polls, etc. The support for multiple accounts is coming soon.