Daily use
-Viber
-WhatsApp
-StickyTiles (to pin notes on startscreen)
-Checklists
-Counters (to monitor data and phone usage)
-Facebook
-Flickr
-Notepad free

Others
-Adobe Reader
-Camera extras
-Compass
-Flashlight 7
-Heart Rate
-Photobucket
-Sound Shaper (to record sound I think)
-Stopwatch Timer
-UC Browser (supports file attachment, but a bit laggy)
-WP Tools (to clear music/video history from Zune)

1) Angry birds
2) Asphalt 5
3) Assasin's Creed
4) Contract Killer
5) Cro-Mag Rally
6) Doodle Jump
8) Fruit Ninja
9) Gun Bros
10) Jet Car Stunts WP
11) Lets Golf 2
12) Minesweeper
13) NFS: Hot Pursuit
14) Parachute Panic
15) PES 2012 (My favourite)
16) Shoot 1UP
17) Shuffle Party
18) Spider Jack (Something like Cut the rope but better)
19) Splinter Cell Conviction
20) 1 Second Game
21) 3D Marble Tracks
23) AE 3D Motor
24) AE Jewels
26) Air Hockey
27) Archer
28) Basketball
29) Bike Mania
31) Drag Race
32) Drop Zone
33) Dropdown
35) Finger Slayer
36) FlyBugFly (something like Mega jump)
37) Funny Bounce (something like doodle jump)
38) Funny Jump
41) Marble Slalom Free
42) Nokia Climate Mission
43) Ragdoll Run (something like Temple run)
45) Roundy Dash
46) Snake
50) Toilet Paper
51) Traffic Rush HD
52) Water Droplets