Just a few weeks ago, I fell in love with GitKraken, which I use with GitHub - however GitKraken cannot do everything (e.g. multi-accounts via hostname and cert-files), so I also use posh-git and bash-completion
Fuck. Ain't gonna say sorry, because that's the name and it does its thing when I mess up my console commands
Since I have an abysmal large number of different accounts, and I do care about security, I keep things manageable with KeePass. Just hit CTRL+ALT+A and it auto-inserts the right account data into the login prompts :)
Nothing says "Productive" like Yakuake jumping onto my screen when I need to input a console command really quickly and then re-hide the console
All the Linux people probably know ALT+Space, however what to do on Windows? Well, say hello, Launchy (oh, and nope, pressing Windows-key and using the Windows Search is very crap-a-lot. No, thanks.)
Also, I dunwanna update all the above mentioned stuff, so I use package managers. Even on Windows: Chocolatey <3 (though I have to say that I have not tried the Windows Store on Win10, yet. Well, at work, that one is not available either way... )
... And a lot of custom scripts on all platforms, which automate away all the manual tasks, like triggering the pm update, syncing stuff between devices, etc.