What are good grep tools for Windows? [closed]

FINDSTR is fairly powerful, supports regular expressions and has the advantages of being on all Windows machines already.

c:\> FindStr /?

Searches for strings in files.

FINDSTR [/B] [/E] [/L] [/R] [/S] [/I] [/X] [/V] [/N] [/M] [/O] [/P] [/F:file]
        [/C:string] [/G:file] [/D:dir list] [/A:color attributes] [/OFF[LINE]]
        strings [[drive:][path]filename[ ...]]

  /B         Matches pattern if at the beginning of a line.
  /E         Matches pattern if at the end of a line.
  /L         Uses search strings literally.
  /R         Uses search strings as regular expressions.
  /S         Searches for matching files in the current directory and all
             subdirectories.
  /I         Specifies that the search is not to be case-sensitive.
  /X         Prints lines that match exactly.
  /V         Prints only lines that do not contain a match.
  /N         Prints the line number before each line that matches.
  /M         Prints only the filename if a file contains a match.
  /O         Prints character offset before each matching line.
  /P         Skip files with non-printable characters.
  /OFF[LINE] Do not skip files with offline attribute set.
  /A:attr    Specifies color attribute with two hex digits. See "color /?"
  /F:file    Reads file list from the specified file(/ stands for console).
  /C:string  Uses specified string as a literal search string.
  /G:file    Gets search strings from the specified file(/ stands for console).
  /D:dir     Search a semicolon delimited list of directories
  strings    Text to be searched for.
  [drive:][path]filename
             Specifies a file or files to search.

Use spaces to separate multiple search strings unless the argument is prefixed
with /C.  For example, 'FINDSTR "hello there" x.y' searches for "hello" or
"there" in file x.y.  'FINDSTR /C:"hello there" x.y' searches for
"hello there" in file x.y.

Regular expression quick reference:
  .        Wildcard: any character
  *        Repeat: zero or more occurances of previous character or class
  ^        Line position: beginning of line
  $        Line position: end of line
  [class]  Character class: any one character in set
  [^class] Inverse class: any one character not in set
  [x-y]    Range: any characters within the specified range
  \x       Escape: literal use of metacharacter x
  \<xyz    Word position: beginning of word
  xyz\>    Word position: end of word

Example usage: findstr text_to_find * or to search recursively findstr /s text_to_find *

Based on recommendations in the comments, I've started using grepWin and it's fantastic and free.

(I'm still a fan of PowerGREP, but I don't use it anymore.)

I know you already mentioned it, but PowerGREP is awesome.

Some of my favorite features are:

• Right-click on a folder to run PowerGREP on it
• Use regular expressions or literal text
• Specify wildcards for files to include & exclude
• Search & replace
• Preview mode is nice because you can make sure you're replacing what you intend to.

Now I realize that the other grep tools can do all of the above. It's just that PowerGREP packages all of the functionality into a very easy-to-use GUI.

From the same wonderful folks who brought you RegexBuddy and who I have no affiliation with beyond loving their stuff. (It should be noted that RegexBuddy includes a basic version of grep (for Windows) itself and it costs a lot less than PowerGREP.)

Additional solutions

Existing Windows commands

• FINDSTR
• Select-String in PowerShell

Linux command implementations on Windows

• Cygwin
• Cash

Grep tools with a graphical interface

• AstroGrep
• BareGrep
• GrepWin

Additional Grep tools

• dnGrep

GrepWin is free and open source (GPL)

I've been using grepWin which was written by one of the TortoiseSVN guys. It does the job on Windows...