One of the most common work on internet is downloading software's. But generally good software are large in size, so it needs longer time and that also continuous.
A solution to that problem, is torrent. A torrent is a technology with which we can download large files(even a complete movie) with it without the need downloading completely in 1 session.

You can download the torrent software, it is very small and free of cost and then download the torrent file of the software you want to download. Then just open the torrent file with that torrent software and it will start downloading in parts whenever you will get online.

Note: There are many websites which provide free torrent of movies and software's. In fact you can also share software and files with torrent. Just Click on make torrent and elect files. It will give you a torrent file for your files. Just share that torrent file and the files will be automatically uploaded to the person whom you will provide the torrent of your file. But for this you also need tracker and seeders. Trackers are provided by websites for free, you just need to search. Seeder are those people who have downloaded your files and can now stay online so that others can also download.

For rar file password crack. There are many techniques. One is brute force attack with dictionary.
In this the software has a list of words from 2 lettered word to 4- lettered word and it tries to put every word as password. If you want to crack with this method then u can download any rar file cracker. Jut google "rar file cracker with crack" .

Here is a torrent which provides 9-10 software for rar and zip file cracker. I have not tried them but i guess they will work :
http://thepiratebay.org/torrent/4675258/Zip_and_RAR_password_cracker
just click on download torrent. But for this download the utorrent software first. Google "download utorrent" and link for download will be available for free.