[larkery]

Web Browser: conkeror

Email Client: emacs

Terminal: urxvt

IDE: emacs

File manager: emacs

Basic Text Editor: emacs

IRC/Messaging Client: emacs

PDF Reader: emacs + epdftools

Office Suite: n/a

Calendar: emacs

Video Player: n/a

Music Player: emacs

Photo Viewer: feh

Screen recording: n/a

[linopolus]

There you have a great operating system – it lacks a good editor, though.