Over time, I have come across the following three sites that contain valuable material for those who are interested in exploring Quran:

1) Quran Audio Library:

This site is available in five languages including Arabic and English. You will find recitation of Holy Quran by more than 100 different reciters from different countries. Clicking on the name of the reciter opens the list of all surahs recited by that particular reciter. Clicking “Download MP3″ in the last column will play the relevant surah. Right clicking on the same link and then clicking “Save Link As” will enable you to download the audio file on your computer. Clicking “Click to Listen” button in the second last column apparently does not work.

2) Tanzil:

This site allows you navigating through Quran using a number of available options. About 18 different reciters are lsited on this site.  Translation is available in more than 30 languages  which makes this site highly useful for a number of people across the globe.  Additionally, there is an option to show roots of Arabic words.

3) Quran Explorer:

This one is yet another great site that contains not only Quran exploring resources but also has a collection of 18000 Hadiths from four books.  In the Quran section, seven reciters with eleven translations in eight different languages are available. Usmani script is also among the options. This site has a lot more additional quran related knowledge base.

When explored in detail,  these three sites have really a great deal of resources for anyone who is interested in Quran Kareem.