Open Directories are unprotected directories of pics, videos, music, software and otherwise interesting files.

For videos/movies/tvshows :

intext:"Search Term" intitle:"index.of" +(wmv|mpg|avi|mp4|mkv|mov) -inurl:(jsp|pl|php|html|aspx|htm|cf|shtml)

Images :

intext:"Search Term" intitle:"index.of./" (bmp|gif|jpg|png|psd|tif|tiff) -inurl:(jsp|pl|php|html|aspx|htm|cf|shtml)

Music :

intext:"Search Term" intitle:"index.of./" (ac3|flac|m4a|mp3|ogg|wav|wma) -inurl:(jsp|pl|php|html|aspx|htm|cf|shtml)

Books :

intitle:"Search Term" (pdf|epub|mob) "name or title" -inurl:(jsp|pl|php|html|aspx|htm|cf|shtml)

You can also find Google Drive shared files similarly.
Shared folders
Shared everything
Works with other domains too.

Some info about google search operators can be found here

Open Directory Search Engines

Java Scriptlets

Save the following code as a bookmark, then you can open the bookmark to run the desired action.
Download all files with a specific extension :

javascript:!function(){var%20t=prompt("Enter%20filetype%20to%20download%20(format:%20.mp3)");if(null!==t)for(var%20e=document.querySelectorAll('[href$="'+t+'"]'),o=0;o<e.length;o++)e[o].setAttribute("download",""),e[o].click();else%20alert("No%20format")}();

Resize "Filename" column in OD to make entire filename visible :

javascript:!function(){function e(e){var o,n,r=e.href;e.textContent=(n=(o=r).split("/").filter(Boolean).reverse()[0],console.log(n),o.lastIndexOf("/")==o.lenght-1&&(n+="/"),n=n.indexOf(" ")>=0?decodeURI(n):decodeURIComponent(n))}anchors=document.body.querySelectorAll("a"),anchors=Array.from(anchors).slice(1),anchors.map(e)}();

Display pictures as thumbnails :

javascript:(function(){function%20I(u){var%20t=u.split('.'),e=t[t.length-1].toLowerCase();return%20{gif:1,jpg:1,jpeg:1,png:1,mng:1}[e]}function%20hE(s){return%20s.replace(/&/g,'&amp;').replace(/>/g,'>').replace(/</g,'<').replace(/"/g,'&quot;');}var%20q,h,i,z=open().document;z.write('<p>Images%20linked%20to%20by%20'+hE(location.href)+':</p><hr>');for(i=0;q=document.links[i];++i){h=q.href;if(h&&I(h))z.write('<p>'+q.innerHTML+'%20('+hE(h)+')<br><img%20src="'+hE(h)+'">');}z.close();})()

Display pictures as thumbnail gallery :

javascript:var%20sHTML=%22<html><head><title>gallery</title><body><center><table%20border=0>%22;var%20y=0;for(x=0;x<document.links.length;x++){a=document.links[x].href;%20if%20(a.match(/jpe|jpeg|jpg|bmp|tiff|tif|bmp|gif|png/i)){sHTML+='<td%20style=%22border-style:solid;border-width:1px%22><a%20target=%22_new%22%20href=%22'+a+'%22><img%20border=%220%22%20width=%22100%22%20src=%22'+a+'%22></a></td>';%20if%20(!((x+1)%5))%20sHTML+=%22</tr><tr>%22}};this.innerHTML=sHTML+%22</table></center></body></html>%22;

The-Eye Image Viewer :

javascript:void(window.open('https://fusker.the-eye.eu/url.php?url='+encodeURIComponent(document.URL).replace(/\./g,'%25252E')));

Another Linked Images Bookmarklet.
More bookmarklets.

Softwares

There are other software programs that provide wget with a GUI like Gwget and WinWGet though I've never used them and hence can't comment on their reliability.

  • youtube-dl (Python) downloads videos from various sites. Just like wget you can find GUI frontend for this.
  • RipMe (Java) is an album ripper for various websites.
  • HTTrack Website Copier (Windows/Linux/OSX/Android) can mirror entire websites.
    Other download helpers you should try :
  • Adware free JDownloader (Win/Linux/OSX/Java) Has GUI
  • xdm (Win/Linux/OSX/Java) Has GUI.
  • uGet (Win/Linux/OSX/Android) Has GUI.
  • curl (Win/Linux/OSX/…) Command line tool.
  • aria2 (Linux/OSX) Command line. A web-based UI is also available.
  • axel (Linux/OSX) Command line tool.
  • Rclone (Win/Linux/OSX) Command line tool. Rclone has some great commands that can list files, print remote directory size or even mount it as mountpoint. Here is a list of all commands. I recommend you to go through their entire website.

You can also use httpdirfs, which is made by a redditor who posted it here to mount the remote directory as mountpoint. It even appears to be somewhat faster than "rclone mount".

OpenDirectoryDownloader

Sites

Search Tools

Search And index Engines DDLs :-

https://filepursuit.com/
https://weboas.is/
https://filesearch.download/
https://www.filesearch.link/
https://ipfs-search.com/

Search GDrive:-

https://www.dedigger.com/
https://whatintheworld.xyz/
https://w3abhishek.github.io/torrentables/
https://eyedex.org/ (Search The Eye)

Search Open Directory DDLs :-

https://odcrawler.xyz/
https://www.filechef.com/
https://opendirsearch.abifog.com/
https://palined.com/search/
https://ewasion.github.io/opendirectory-finder/
https://open-directories.reecemercer.dev/
https://lumpysoft.com/
https://www.eyeofjustice.com/od/
https://sites.google.com/view/l33tech/tools/ods
https://lendx.org/

Archiving And Searching Engines:-

https://the-eye.eu/ (archives and indexes Web Pages)
https://archive.ph/ (archives web snapshots)
https://archive.org/ ( The Internet Archive)
https://archive.org/web/ (The Wayback Machine)

FTP Indexers:-

https://www.mmnt.ru/int/
https://www.catfiles.net/
https://sites.google.com/view/l33tech/tools/pasteskimmer (Paste search tool)