When it comes to Watching movie’s online there are lot of services available on the net which allows you to watch Bollywood Movies Online.
Here is a List of 8 Popular Sites :
Upadate:But now we had list of 20 sites

1.BhejaFry:

BhejaFry offers high quality DVD movies, Live TV, Live sports, radio and other music videos online for free. You can check out the complete list of movies here.

2. Bharat Movies:

Bharat Movies offer high quality DVD movies online for free. This site also offers regional language movies like Kannada, Telugu, Tamil, Malayalam and Bengali movies for free. It has a good collection of latest Hindi movies.

3. BollyClips:</span>

BollyClips is another site which offers good quality and latest Bollywood movies for free. Apart from this, it also offers mp3, radio and Live TV services.

4.ApnaView:

ApnaView.com is a website which offers Free Movies Online. The site offers hindi movies, hindi albums, cricket highlights, hindi music videos, punjabi movies, punjabi music videos, tamil movies, malayalam movies, upcoming movies, etc.

5.DesiFun:

DesiFun is also Another Great site. Which plays all the New Bollywood Movies and Albums.

6. 123OnlineMovies:

123OnlineMovies offers movie download apart from watching it online. Most of the movies are linked to online storage or Youtube.

7. BollySaga-

BollySaga is another free cool site which offer lots of old and Bollywood movies. Although the collection of movies is less when compared with other, its worth a try.

8. Hindi Movies Online:

From here you can watch all the Latest Bollywood Hit Movies and Also download them to you PC.

Update:
Adding few more online sites for bollywood movies,but not as popular as above 8 sites

1. Lucky88
2. Matrimonialbank
3. MusicNmovies
4. watch-hindi-movies.com
5. VideoDuniya
6. Bulbule
7. Filminagari
8. Interval
9. Bolly-Zone
10. Playdesi
11. MovieDesi
12. Hindilinks4u

sai