Tools

Tools, programs, what I recommend:

Fast Stone Image Viewer
Fantastic image viewer with super flexible settings. It has all what I can need to see my graphics collection in confortable way.

Visual Studio Code
Very good cross-platform free IDE/editor from Microsoft, "brother" of Atom. but, as for me, looks more clean. There is support of Haskell even (including debug). I like it!

Links binaries for Win32/64
Text-based Web-browser with binaries for Windows and graph mode support too

Spacemacs
Something absolutely fantastic! Community bundles (and more!) which switch Emacs to spaceship with very-very close Vim (evil) mode support!

Recoll
Desktop search application for Ubuntu. It first indexes all files (user can customize folders to be indexed - top folder, what to add, what to skip, specialize files, etc.), indexing may be in background. Results are represented as Google-like list but it may be customized via HTML/CSS template. There is preview of context. Recoll can index many formats: .chm, .pdf, .html, different archives, and so on... After indexing, lookup procedure is very fast

Online Haskell "interpretator"
I tryed several online Haskells and for me this looks very good.

Pdfgrep
Very cool analogue of grep Unix utility but searchs in pdf files. Usually is used in something like:

find . -name *.pdf -exec pdfgrep -iHn some_text {} \;

Byobu
If you have experience with tmux, Screen, etc., you need Byobu! It's a text-based window manager and terminal multiplexer. If you have problems with tmux (when use mc, when scrolling/copying text), try Byobu. Supporting of console tiling (splitting, unsplitting, joining, detaching and many more).

SumatraPDF
User-friendly beautiful very lightweight browser for PDF, PS, DJVU, CHM, XPS, Mobi, EPUB, Fiction Book, CBR, - what else? - formats with (ATTENTION!): support of custom background - with pleasure for your eyes! Very good portable (one EXE file!) application for Windows, with automatic update.