Apollo with Awesome Beats for music.
MX Player Pro for any media.
Cricbuzz for Cricket scores
ES Task Manager to stop battery wasting app startups
Footy Live for footy scores
Camera Pro, much better than standard camera app, lets you bracket pics too.
Podkicker for podcasts
Seconds Pro, great hiit timer
ROM Manager for system backups
Titanium Backup to backup apps and data.