Here are the main features of Internet Download Manager (IDM) 6.29 crack:

1. Advanced Integration: IDM seamlessly integrates with popular browsers like Google Chrome, Mozilla Firefox, Opera, Safari, and more.

2. Smart Accelerator: This feature optimizes downloading speed up to five times by automatically splitting files into smaller parts and then reassembling them in the correct order as they are downloaded from multiple sources simultaneously on different connections (like cable / DSL).

3. Resume Downloading Capability: If your internet connection drops during a download, IDM will resume where you left off without having to start over again.

4. Support for Multiple Protocols: It supports major protocols like HTTP/HTTPS/FTP/BitTorrent and others including RTDL link grabber that allows automatic adding of downloads from supported websites directly into the list.

5. Downloading Video/Audio Files:

- IDM can download video files in various formats, such as MP4, AVI, MKV, MOV, etc., without requiring any third-party software.

- It also supports downloading audio-only files like MP3s and more from popular sites like YouTube, Dailymotion, Facebook, Vimeo, and others.

6. Downloading Files from Various Sources:

- IDM can download files from various sources including torrent sites, peer-to-peer networks (like BitTorrent), direct links, magnet links, etc.

- It also supports downloading through proxy servers or behind firewalls using different protocols like HTTP/HTTPS SOCKS5 proxies.

7. Advanced Features for Increased Download Speed and Security:

- IDM's smart dynamic IP address feature changes your public IP to make it harder for sites to block you from accessing certain content based on your IP.

- There is also a built-in scheduler that lets you schedule downloads at specific times or days of the week/month/year so they don't interfere with other activities.

8. Comprehensive Error Recovery and Resume Functionality:

- IDM's advanced error recovery capability will restart broken or corrupted downloads due to network problems, internet disconnections, etc., allowing you to resume where we left off without having to start over again.

9. Support for Multiple Platforms:

- Internet Download Manager (IDM) supports Windows operating systems starting from XP up to the latest versions including Vista/7/8/10 both 32-bit and 64-bit architectures.

- It also has a portable version that doesn't need installation, making it easy to carry around on USB drives or other external storage devices.

Overall, IDM is an all-in-one download manager that offers many features for increased downloading speed, security, convenience, and flexibility across multiple platforms.