Termius: A very nicely designed SSH & SFTP program
Sip: A menubar app to grab colors from your screen in hexadecimal
Amethyst: A Tiling Window Manager. You'll either love it or hate it, depending on how much you like keyboard shortcuts
Codekit: An all-in-one preprocessor. Less practical for large projects, but it's no-nonsense setup is nice for small ones
Arc Browser: A mac-exclusive Chromium based browser, built specifically to organize large amounts of tabs at once. It also provides excellent support for splitting the pane between multiple tabs and is very pretty
I'll second the rec for iTerm 2. It's a very dependable terminal.
Pyre by Supergiant - You have likely heard of Hades by this studio, but Pyre is a whole different beast. It's basically fantasy basketball set in the underworld, with a variety of magical species with different abilities in the game. It also has (as is this studio's habit) absolutely stellar writing, music, and 3 dimensional characters.