[Nexus 7 General] fr4nk1yn:
There's millions of these devices around. If not laying in a draw or closet, they're on craigslist or ebay half of a N7'13, (2013 model should be considered if purchasing).

Share and discuss your setup, apps, and experiences here.

ROMs:

Timur's USBRom: Android 4.2 Jellybean. No longer developed.

http://www.adrive.com/public/hMdX4p/cm-10.1-20130817-USBROM-grouper.zip

Gapps: http://www.adrive.com/public/rj748P/gapps-jb-20130812-signed.zip

AutoDroid: Android 4.4.4 Kit Kat. No longer developed.

http://xdaforums.com/showthread.php?t=2789993

*May have a problem booting after install. Flash a below kernel to fix.

Kernels:

Kangeroo: For Kit Kat ROMs. Inactive(?) since Jan 2014.

http://xdaforums.com/showthread.php?t=2558717

Oxydo: For Lollipop ROMs.

http://xdaforums.com/nexus-7/development/oxydo-revamped-kernel-nexus-7-2012-t2978950

Apps:

Headunit: Android Auto head unit app.

http://xdaforums.com/general/paid-s...nit-android-auto-t3125252/page69#post62485618

Power Event Manager 1.8: Changes power settings for above kernels allowing tablet to sleep/wake with external power.

http://xdaforums.com/showpost.php?p=62287264&postcount=145

App Ops: Or any permission manager you like.

https://play.google.com/store/apps/details?id=com.findsdk.apppermission

Autosleeper Auto power ON-OFF: I haven't tried this but functionality seems somewhat equivalent to PEM above.

https://play.google.com/store/apps/details?id=com.as.powerchecker

Wakelock Detector [Root]: Use with App Ops to stop apps keeping the tablet awake.

https://play.google.com/store/apps/details?id=com.uzumapps.wakelockdetector&hl=en

Trigger: Tasker-like app for automation. Simple set-up..

https://play.google.com/store/apps/details?id=com.jwsoft.nfcactionlauncher

Tasker: Powerful automation app but incredibly user unfriendly.

https://play.google.com/store/apps/details?id=net.dinglisch.android.taskerm

[*]Secure Settings: Allows Tasker to perform even more powerful automation.

https://play.google.com/store/apps/details?id=com.intangibleobject.securesettings.plugin

[*]Power Event Manager Helper: Helps PEM kill a few stubborn apps then put the tablet in lp0.

Attached in 2nd post.

Hardware:

OTG Cable: Don't cheap out here, charging for the tablet and phone must go through the wires.

http://www.amazon.com/dp/B00UJ5D5ZS?psc=1

http://www.amazon.com/gp/product/B00NSBVNCM?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00

Ground Loop Isolator: Filters alternator, and charging whine. Doesn't degrade music quality.

http://www.amazon.com/gp/product/B00NSBVNCM?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00

Digital Audio Convertor: Can be found locally at music stores. Fantastically excellent sound!!

http://www.behringer.com/EN/Products/UCA202.aspx

Others/Tips/etc:

Put the tablet in bootloader and type this command into CMD/terminal.

This makes the tablet to boot when external power is turned on without physically pressing the button, even if the battery has completely discharged.

fastboot oem off-mode-charge 0

If using a Lollipop ROM and experiencing the NlpCollectorWakeLock here's a fix, you must be rooted:

Remove com.google.android.gms with titanium backup (or another utility),

Download the latest "230" version of Google Play Services from apkmirror.com,

Install,

Reboot.

Smooth Scroll Mod: Possible created a random reboot on the order of once 3 or 4 days.

It goes without saying, maybe, but do not install 3rd party widgets. Beautiful Widgets for example will cause thousnads of different wakelocks though a night. -inadvertently tested.