Many websites are useful for tracking live scores, results, odds, lineups and other betting related stuff I use few of them myself everyday.

1. FlashScore is one of the best and they just got rebranding with new logo and great new theme.
Good thing about FlashScore is that you can follow latest new, injured players and odds change, and they have different domains with other languages.
I would add odds for Sportsbet and other crypto betting websites, maybe someone could think about this sponsorship.
https://www.flashscore.com/

2. 365scores is good alternative when FlashScore is not working and it does something better, Head to Head matches stats are better done.
Graphical lineups with player faces and rating look better than in FlashScore, but injured players are not always up to date.
https://www.365scores.com/

3. Aiscore is good website that can serve for watching free live streams with simple registration.
It has better notification system than flashscore or 365scores with more optional settings.
https://www.aiscore.com/

4. Oddspedia has very similar look like 365scores.
https://oddspedia.com/

5. Goaloo is very good if you want most customization for notification in visual and sound, offering four types of sounds so you can separate home and away sounds.
https://www.goaloo.com/



There are much more websites but this is what I use, and my daily driver is FlashScore website.
What website do you use and why?