Using cracked software is a violation of the End User License Agreement (EULA) and is considered digital piracy. Supporting developers ensures that the software continues to receive security patches and new features. The Safer (and Better) Way
: Malicious commands can be embedded in seemingly harmless files or linked to
Open directories usually don't have the pop-ups and "Download" buttons that lead to spam sites.
: This text appears in these automated lists as a link to navigate up one folder level.
You are probably looking for Internet Download Manager (IDM)—a popular piece of software that can accelerate downloads by up to five times. You want the "Premium" features (like video grabbing and scheduled downloads) without paying the $24.95 license fee. And you have learned that sometimes, unsecured servers list their files in a simple, open directory format (an "Index of Parent Directory") where cracks and keygens might be hiding.
Cracked versions of IDM found in open directories are frequently used as delivery vehicles for malware.