My .vimrc:

filetype on                                   " Auto-detect filetype
filetype plugin indent on                     " Auto-indent
set expandtab                                 " No TABs...
autocmd FileType make set noexpandtab         " ...except in Makefiles
autocmd FileType cpp set keywordprg=cppman    " Using cppman for 'K' keyword help in C++ files
autocmd BufWritePost *.c,*.h,*.cs silent! !ctags . & " Ctrl-], Ctrl-t

" If some system gives you problems with encodings and you suspect a
" broken Vim setup, try uncommenting this.
"set encoding=utf-8

set shiftwidth=4                              " 1 indent = 4 spaces
set tabstop=4                                 " 1 TAB = 4 columns
set ruler                                     " Display cursor position
set laststatus=2                              " Display status line
"set statusline=%F%m%r%h%w\ [FORMAT=%{&ff},%{&fenc}]\ [TYPE=%Y]\ F2-Paste,\ F8-Tags\ %=[COL=%03v][ROW=%04l/%04L]\ %03p%%
set statusline=%F%m%r%h%w\ %=[%{&fenc}][C%03v][R%04l/%04L]
set listchars=tab:>-,trail:·,nbsp:»,extends:# " How to display whitespaces
set list                                      " Display whitespaces
syntax on                                     " Syntax highlighting
color koehler                                 " Color scheme
set background=dark                           " Contrast for on-black xterms (which I prefer)
set wrap                                      " Wrap long lines
set showmatch                                 " Briefly jump to opening brace
set vb t_vb=                                  " Disable terminal beeps
set incsearch                                 " Incremental search (remember to press <RETURN> when done)
set scrolloff=3                               " Keep 3 lines above / below cursor when scrolling
"set spell                                    " Spellchecker on (]s - next word, zg - add good, zug - undo add, z= - suggest,
                                              " :spellr(epall) - replace all occurences)
setlocal spelllang=de                         " Setting language for spellchecker
set mouse=a                                   " Enable mouse support for all modes
set pastetoggle=<F2>                          " Toggle 'paste' mode to en-/disable auto-formatting of pasted text

set tags=./tags;$HOME

highlight ColorColumn ctermbg=magenta
call matchadd( 'ColorColumn', '\%76v', 100 )  " Set a 'warning' highlight on column 76

set hlsearch                                  " Highlight search matches

" 'hlsearch' makes it hard to tell which is the *current* match, so we
" do some trickery to highlight that one in a special way (flashing for
" 0.4 seconds).

" function to flash the current match a number of times
function! HLNext (blink)
    let [bufnum, lnum, col, off] = getpos('.')
    let matchlen = strlen(matchstr(strpart(getline('.'),col-1),@/))
    let target_pat = '\c\%#\%('.@/.'\)'
    let i = 1
    while i < a:blink
        exec 'sleep 50m'
        let ring = matchadd('Comment', target_pat, 101)
        redraw
        exec 'sleep 50m'
        call matchdelete(ring)
        redraw
        let i += 1
    endwhile
endfunction

" Rewire n and N to step-and-call-function
" Disabled by default because, if you step through many matches often,
" the blink delay can slow you down considerably.
"nnoremap <silent> n   n:call HLNext(5)<cr>
"nnoremap <silent> N   N:call HLNext(5)<cr>

" Settings for vim-taglist (http://vim-taglist.sourceforge.net)
nnoremap <silent> <F8> :TlistToggle<CR>       " F8 toggles taglist
let g:Tlist_GainFocus_On_ToggleOpen = 1       " ...give focus...
let g:Tlist_Exit_OnlyWindow = 1               " ...exit if last window open...
let g:Tlist_Use_Right_Window = 1              " ...open taglist to the right...
let g:Highlight_Tag_On_BufEnter = 1           " ...highlight tag when entering buffer...
let g:Tlist_Auto_Open = 0                     " ...do not open by default...
let g:Tlist_Auto_Update = 1                   " ...update automatically...
let g:Tlist_Show_One_File = 0                 " ...show all open files...
let g:Tlist_Enable_Fold_Column = 0            " ...disable folding...
let g:Tlist_Use_SingleClick = 1               " ...enable jump-on-click...

" Settings for vim-latex (http://vim-latex.sourceforge.net)
set shellslash                                " Convert backward slashes to forward ones in filename references
set grepprg=grep\ -nH\ $*                     " Force grep to display file name even in single-file searches
let g:tex_flavor='latex'                      " Force .tex to mean LaTeX, not plain TeX
let g:Tex_SmartQuoteOpen = "``"               " Opening quote, English style (German would be "\"`")
let g:Tex_SmartQuoteClose = "''"              " Closing quote, English style (German would be "\"'")
let g:Tex_AutoFolding = 0                     " Do not fold on opening file
let g:Tex_Env_table = "\\begin{table}\<CR>\\caption{<++>}\<CR>\\label{tab:<++>}\<CR>\\begin{tabularx}{<+width+>}{<+columns+>}\<CR>\\hline\<CR><++>\<CR>\\hline\<CR>\\end{tabularx}\<CR>\\end{table}<++>"
let g:Tex_Env_list = "\\begin{lstlisting}[<++>]\<CR><++>\<CR>\\end{lstlisting}<++>"  " list<F5> gives lstlisting environment
let g:Tex_Com_list = "\\lstinline{<++>}<++>"                                         " list<F7> gives lstinline command

" Workaround for Gnome-Terminal bug showing >4;m escape sequence
set keyprotocol = ""
let &term = &term

My .gvimrc:

highlight Normal guifg=green guibg=black      " Colors as I like them
set guifont=Monospace\ 10                     " The default font sucks
set lines=50 columns=150                      " Just for example

" From https://vim.fandom.com/wiki/Restore_screen_size_and_position
if has("gui_running")
  function! ScreenFilename()
    if has('amiga')
      return "s:.vimsize"
    elseif has('win32')
      return $HOME.'\_vimsize'
    else
      return $HOME.'/.vimsize'
    endif
  endfunction

  function! ScreenRestore()
    " Restore window size (columns and lines) and position
    " from values stored in vimsize file.
    " Must set font first so columns and lines are based on font size.
    let f = ScreenFilename()
    if has("gui_running") && g:screen_size_restore_pos && filereadable(f)
      let vim_instance = (g:screen_size_by_vim_instance==1?(v:servername):'GVIM')
      for line in readfile(f)
        let sizepos = split(line)
        if len(sizepos) == 5 && sizepos[0] == vim_instance
          silent! execute "set columns=".sizepos[1]." lines=".sizepos[2]
          silent! execute "winpos ".sizepos[3]." ".sizepos[4]
          return
        endif
      endfor
    endif
  endfunction

  function! ScreenSave()
    " Save window size and position.
    if has("gui_running") && g:screen_size_restore_pos
      let vim_instance = (g:screen_size_by_vim_instance==1?(v:servername):'GVIM')
      let data = vim_instance . ' ' . &columns . ' ' . &lines . ' ' .
            \ (getwinposx()<0?0:getwinposx()) . ' ' .
            \ (getwinposy()<0?0:getwinposy())
      let f = ScreenFilename()
      if filereadable(f)
        let lines = readfile(f)
        call filter(lines, "v:val !~ '^" . vim_instance . "\\>'")
        call add(lines, data)
      else
        let lines = [data]
      endif
      call writefile(lines, f)
    endif
  endfunction

  if !exists('g:screen_size_restore_pos')
    let g:screen_size_restore_pos = 1
  endif
  if !exists('g:screen_size_by_vim_instance')
    let g:screen_size_by_vim_instance = 1
  endif
  autocmd VimEnter * if g:screen_size_restore_pos == 1 | call ScreenRestore() | endif
  autocmd VimLeavePre * if g:screen_size_restore_pos == 1 | call ScreenSave() | endif
endif

My .vim/after/syntax/tex/lstlisting.vim:

" To keep Vim from trying to syntax-highlight included source as LaTeX
" (http://stackoverflow.com/a/21651323/60281)
syn region texZone  start="\\begin{lstlisting}" end="\\end{lstlisting}\|%stopzone\>"
syn region texZone  start="\\lstinputlisting" end="{\s*[a-zA-Z/.0-9_^]\+\s*}"
syn match texInputFile "\\lstinline\s*\(\[.*\]\)\={.\{-}}" contains=texStatement,texInputCurlies,texInputFileOpt

My .vim/indent/tex.vim:

let b:did_indent = 1                          " Disable indenting for LaTeX files