Best Tweaks on cydia
1 . Lockinfo - It allows you to see unread notifications , reminders and mails on the lockscreen of your device . If you have added SBsettings it is also displayed . If you have an iPhone it will also display messages and missed calls.
2 . SBsettings - It can be used to display a small window in your apple device which displays all info . about your device from IP address to memory it also allows you to add things to your menu bar .
3 . MyWi - It allows you to make your device into a WIFI hotspot allowing you to share a 3g connection without paying any to your 3g provider it can be bought for $19.99 from cydia .To add for free add source
4 . My3g - It allows you to use application on 3g which only run on WIFI for eg - Facetime , youtube ,etc. . It is for $3.99 on cydia . To add it for free add source - h7v.org/
5 . Winterboard - It allows you to set themes on your apple device
6 . Wi-Fi Sync - It allows you to sync with your iTunes over Wi-Fi without connecting USB cord to your computer . It is for $2.99 on cydia . To add it for free add source - theiphonespotrepo.net/apt
7 . Barrel - It allows you to add different kind of styles while you are turning your page for eg - Roll away alternative . It is available for $2.99 on cydia . To add it for free add source - www.sinfuliphonerepo.com
8 . Activator - This tweak allows you to access any app and setting from anywhere by doing certain action for eg - hold volume up button for long
9 . Frash - This is a tweak which allows you to use flash in safari, you can run things which run on flash with frash
10 . CY Delete - It is a nice tweak it allows you to delete anything. For eg - winterboard