If you feel anything is missing please PM me, I will keep this updated. Please thank the OP's.
A Tips and Tricks Blog (new so only a few posts for now)
Root
Easiest 3 clicks to fully root and unlock nand
How to get root
Full root part 2
Rooting and Flashing Evo Instructions for super n00b's on PC's
How to get root the easy method (this has to be applied every reboot)
[How-To] One Click Rooting+Nand Unlock+Permanent Recovery (Windows Only)
Keyboards
Best Evo keyboard ever
You need to put a check by it in settings/Language & keyboard/Swype, and then long press your text input area and select input method. (Yes you can switch between the keyboards).
Flash on Evo
Full Flash on the Evo
Mods, themes, clocks home screens and more
Evo Playground-Mods, Themes and More!
Evo Home Screens Thread (NSFW)
ADW Launcher
MSL Codes
Get MSL Code Without CDMA Workshop
Easy Mode Get MSL Code Without CDMA Workshop
Yet another method to get MSL if the above fail
Stock Radio
Stock Evo Radio
Video Chat
Video Chat how-to
Hide pictures, videos or files
Guide - Hide Pictures, Videos or other Files
Close Apps
How do you "end/close" an app?
Remove Facebook Birthdays
Remove Facebook Birthdays from the Calandar
Wifi Tether
Free Wifi Tether root needed
Latest Method
Apps that are safe to remove with root
Post 7 seems to be the most informative.
Ring tones and Notifications
Custom Ringtones
Set Custom Ringtones Method 1
Set Custom Ringtones Method 2
How to use the missing Ringtone Trimmer App
Ringtone Trimmer
Battery Tweaks
Battery Tweaks Discussion
Better battery life, reduce Time Without Signal
Format SD card battery trick
Rings Extender from the market lets you set any audio file on your SD card as a ringer or any other notification.
Ringdroid from the market will let you take clips from audio files and set them as ringtones or any notification.
Missing Notifications?
You can use "Missed Reminder" from the market to repeat notifications.
or
Handsent Sms You can control the vibrating pattern.
Remove Boot Sound
Emulators
Guide to setting up emulators
SMS
Backup SMS
MISCELLANEOUS
Change banner with CDMA Workshop
Programing resource for cooking roms, themes and so on
Improve call quality
Stream music from your PC
Microphone jack fix
Keep high res photos for contacts
To keep screen from turning off while charging go to Settings/Applications/Development, and choose stay awake.
To play Mpeg1/2/4, DivX/Xvid, WMV install yxplayer from the market
Use your flash as a flash light with LED Light from the market
or try
"LED Desire Light" app instead.... its way brighter, sends SOS, strobe, and you can modify intensity.
Thanks to Nutzy19 for this tip.
hold down the menu button, the keyboard pops up for you. so if you open an app or page that has the typing field at the top for example, you dont have to reach up there and tap inside to get the keyboard which i noticed needs to be done sometimes. you just hold menu key and keyboard pops up. (Thanks to Newone757)
MUST HAVE APPS
ATK (Advanced Task Killer)
Skyfire (Slick Web browser) and or Dolphin HD
Shazam (Find out the name of a song playing)
Pandora (Streaming radio app)
ES File Explorer
Layar (You just have to try it)
ScanLife (Scan bar codes to Android apps)
I Music Tao (Find any song you want) Have trouble finding it PM me.