Going to do this right this time, and prove that iDevices can actually be useful to the average geek and not just for looks/sex appeal to the masses. This thread is going to avoid discussion on pirated apps. Cool apps: Acrobits Softphone/Groundwire: Full fledged SIP/VOIP app. works as good, if not better than the anrdoid equivalents. G729 codec support, incoming and outgoing calls, ties in with phone contacts. Seamless transition from 3G/LTE to WiFi and back (between calls). Works on iPads and iPods, turning them into wifi/3G VOIP phones. For reference, i have two VOIP accounts with mynetfone (an australian VOIP provider) one with a landline 'home' number that links to my iphone, and one without an incoming number that i use for private calling. due to the prices here in Au, VOIP calls to landlines are free, while i get better mobile to mobile rates from the phone as normal. See the spoiler for a screenshot of this running fullscreen on my first gen ipad, turning it into my home phone on wifi and 3G. Spoiler Teamviewer: Remote desktop control app, with a free PC client/host. Does NOT require port forwards. The iPad version gets bonus points here, because you can have it change the hosts resolution to match your iPad, for a 1:1 screen image with native touchscreen support (no dragging a mouse cursor - its like having a touchscreen windows on your iPad) Teamspeak 3: I suppose this only applies if you use teamspeak for gaming, but its damn handy to have on your iphone - on anything with iOS6, it also works perfectly with bluetooth headsets. Chrome: synced browser between your desktop and mobile browsers, including tabs and passwords? yes please! (incognito mode for those late night iPad porn sessions too ) Stanza: Free app. Tie this in with Calibre (windows software) and you have a damn powerful Ebook combination. Convert any PDF, Epub or text file to fit properly on your device, and download them over the built in wifi server in Calibre. Mundane but useful apps: Techpowerup app: well, duh Facebook Messenger: Not just the facebook app, this ones purely for messaging. Latest versions are adding VOIP calling, probably through their tie-ins with skype. Skype: Video calling is a lot easier on a phone/tablet than on a PC, since the camera is integrated. Like facebook, this can be used to save money as a 'free' alternative to texting people (assuming they use the skype as well) Google Maps: again with the obvious. best free navigation system around. Flashlight (or any similar app): holds on the camera flash, making your phone a flashlight. should be a stock feature, but its not. Tunein Radio: away from home, or poor signal? use wifi or 3G to listen to online versions of your favourite radio station Speed Test: the app version of speedtest.net, this lets you do some tests to determine the speed of your 3G/LTE/wifi networks. can be useful for troubleshooting problems. Essential Tweaks: A few battery life tweaks: Turn off bluetooth if you arent using it. Same with LTE on the latest devices. If you're using an iPad for offline purposes, set it to airplane mode so that the battery doesnt drain at all when its idle (for example, ebook reading) Do not disturb mode (ios6) on a timer can be used to save battery life as well - since notifications arent waking up the screen, beeping, or vibrating, it can extend battery life quite a bit when you're asleep or at work. Disable auto screen brightness - this can actually waste CPU power and cause lag on older iDevices, quite noticeable on my first gen iPad. Jailbroken Tweaks/apps: These are cydia tweaks/apps, some free, some paid. Adblocker: Something i really miss on non-rooted android devices and non JB iDevices. On apple, this works really easily: it keeps a list of known ad links/addresses, and when you choose to do so, it simply blocks them from showing. This can be used to block the ads in free apps like angry birds, making them lag less and behave more like the paid versions. Spoiler Since my iphone 5 cant be jailbroken at the time of writing, this will focus on iPad jailbreaks that i'm runninng. FullForce and Retinapad: Hacks to make 'iphone' apps look like 'ipad' apps. Extremely noticeable on apps like facebook messenger, which dont have ipad versions. Removes all the aliasing/jaggies on text when in '2x' mode. Here is a comparison of the Groundwire app in 2x mode, between stock apple and retinapad (paid). the fullforce (free) i have glitches out with groundwire. Spoiler Note the rather large difference in quality of the text - thats not compression in the images, thats just how bad apple screw over 'iphone' apps on the ipad without these tweaks. Displayout: more or less, this tweak allows you to modify the behaviour of VGA/HDMI output. you can force specific resolutions (if hardware supported) for all apps, instead of needing an app to officially support external displays. This solves a lot of problems with video apps (that arent youtube) not mirroring onto external displays. (PS: angry birds on a 40" LCD is awesome) Spoiler ManualCorrect: a replacement/additive to the infamous autocorrect. changes the behaviour quite drastically, and for the better. google will show better examples for this than i can provide. Quasar: multi tasking for the ipad! this allows you to run apps in a window, letting you run two (or more) apps simultaneously. Doesnt work right for me on a first gen ipad, as the hardware is too slow but shows enormous potential for multitasking. Factory reset your iphone without losing jailbreak! Run the windows program Semi-Restore http://semi-restore.com/ let the phone reboot, ta-da! i also used the program http://www.copytrans.net/ so that i didnt need itunes (it downloads legit apple drivers from apple, and installs them without itunes) in my case since it was jailbroken, i had to re-jailbreak the phone with evasion, and reinstall the 'preferenceloader' tweak (had to set it to 'hacker' mode in cydia to see it), otherwise tweaks didnt show up in the settings app.