What are some alternatives?
When comparing Tweetdeckr and Twidere, you can also consider the following products
TweetDeck - TweetDeck is your personal browser for staying in touch with what’s happening now.
Tweetbot - Sync your timeline across your iPhone, iPad, and Mac. Mute tweets by user, hashtag, tweet source, or keywords (including regex). 3rd Party support for image, video, read later, and timeline sync services.
HootSuite - Enhance your social media management with Hootsuite, the leading social media dashboard. Manage multiple networks and profiles and measure your campaign results.
Gwibber - Gwibber is an open source microblogging client for GNOME developed with Python and GTK.
Choqok - Choqok - KDE Micro-Blogging Client The name comes from an ancient Persian word, means Sparrow!
Tusky - A Mastodon client with basic features and the option to choose between a dark and a light theme.