Kernel's

How to Flash/Install kernel check out this simple guide
->http://adf.ly/358ro

You need to root your phone before installing custom kernels
How to root your phone
->http://adf.ly/35Elc

List of well known Kernel's for P500(check whether your ROM is .32 or .35 compatible as .35 kernel wont work on 2.2 roms with froyo libraries ,this kernel works on 2.3.3 roms
also 3.0.x is ICS kernel use it only for cm9.2 and above but i would suggest not to try these kernels on jb due to development issues and also restrain from using on GB roms)

3.0.x Kernels:
[3.0.8/3.0.68][CAF][androidarmv6team]
Download/Info->http://adf.ly/LWN6D

[3.0.x][sweetnsour.kernel]
Download/Info->http://adf.ly/LWN3l

[3.0.8][Nayak-Kernel3]
Download/Info->http://adf.ly/LWN1x

candiedIce V3 (3.0.8)
Download/Info->http://adf.ly/AFn8v

.35 Kernels:
PaoloM70's OC Gingerbread kernel
Download/Info->http://adf.ly/AFnAr

Franco Kernel
 
Download/Info->http://adf.ly/5ljX5

thachtunganh's ThunderVN : 
Download/Info->http://adf.ly/AFmsj

fserve's Goldenleaf 
Download/Info->http://adf.ly/AFmyF

mario_fe's Cyanogenmod Kernel 
Download/Info->http://adf.ly/AFn22

_Arjen_'s Icy.Kernel

Download/Info->http://adf.ly/5lkUk

DJNoXD's modded Cyanogenmod Kernel 
Download/Info->http://adf.ly/AFn8v

Official GingerBread Kernel(.35)
Download/Info->http://adf.ly/5lkAG


.32 Kernels:
Franco kernel
http://adf.ly/34cxC ->CFS version for Multitasking
http://adf.ly/34d0k ->BFS version for Performance/Better Gaming
Goldenleaf.v111206-> http://adf.ly/4QLam (Goldenleaf is a rewrite from stock lg kernel with almost all the newest features. Made for the best battery life. these are .32 kernel's)
BFS franco.Kernel-gbs.v20a-gamer-> http://adf.ly/4QLoR (best kernel for gaming as now on screen touch cpu doesnt spike to 100% ,but only to 30%)
CFS franco.Kernel-gbs.v20a-> http://adf.ly/4QLqA
v19 BFS -> http://adf.ly/4QLVM (One of the last gbs kernels without scrolling shutter but with cpu spike)

Drellisdee's kernel-> http://adf.ly/AFlg4
Mik_os's lag fix kernelv1.0 ->http://adf.ly/34dET
v1.1 ->http://adf.ly/34dHm
(PS: v1.1 has been reported by some users to have higher battery drain,so if any issues just flash v1.0)
DookMatt 2.2.2 kernel with optimized OC and LG Lagfix
v1.0->http://adf.ly/34hKB
waleedq's Axis inversion fix kernel
Download/Info->http://adf.ly/AFnMq

der_caveman's_kernel(CM kernel with improved touchscreen driver)
Download/Info->http://adf.ly/5lkOb

Sippolo's Touchscreen Optimized Kernel v1.1
v1.0->http://adf.ly/34dTm

LOL lagfix kernel 2.2.2
LG Original/Stock Kernel
Download->http://adf.ly/34hPT

You can try putting add-on tweaks you can find them here