I want to ask something,why people still using file manager apps although there are already "MyFiles".
I'm curious and just asking.

my apps on Samsung Galaxy Ace

Social networks
- Tweetdeck (for Twitter & Facebook updates)
- Skype (for free calls. but always running in the bg. don't like it but no choice)
- Foursquare (for checking-in. but not using anymore)
- Whatsapp (free msg-ing with those having Whatsapp acc)
- Viber (like Whatsapp but with VOIP function)
- Molome (more or less like instagram for iPhone. photosharing app)

Cameras
- Camera360 Ultimate (very good fun camera with alot of effects)
- ActionSnap (fun camera. let you take a few pics at the same time)
- Mei Tu Xiu Xiu (good photo editing app. only in chinese but easy to work around)

Games
- Reversi Free
- Shaky Tower
- Big Big BIG 2

Tools
- Goggles (Google using image)
- Papago X5 (navigation app)
- Green Power (cuts off your 3G/Wifi when your phone screen is off so it saves battery. really works for me)
- Advanced Task Manager (kills your bg running apps within the set timer)
- Springpad (notepad app. can sync with Chrome browser app on your desktop)
- Cinema Showtimes (showtimes in Malaysia)
- GO Launcher Ex (home launcher. the ui is a LITTLE faster than the original home. doesn't lag)
bolded apps are recommended

Ever had the ringtone volume accidentally changed accidentally because you inintentionally pressed the volume rocker? Introducing Volume Control +. It allows you to set the individual volumes, and lock it in place.

https://market.android.com/details?id=com.c...umePlus&feature

You can choose to lock any volume you want. Like for me I lock the ringtone and notification volume. This respects the ringer mode, like if you put silent mode, the ringtone and notification will be silenced as well. BTW you can also lock the ringer mode, in case you do not want to accidentally change the ringer mode.

Auto launches on boot too!

Any app that can password protect a file or folder?  Found some on the market but not sure if they're reliable.

Also, any messenger app that can customize background / skin?  Am currently using eBuddy but don't like the background color or how it overwrites my display message (any way to disable this?).

Is there any applications to allow permission to just one app in the phone to access network connection?

my phone was set 30sec timeout which automatically lock the screen to save energy. Is there any application that can stop it to lock while i m doing some task/some job (eg: downloading, reading, browsing, or music player is on) pls don't ask me to set it to longer timeout... i don't want tat way... sorry for my broken language.

due to the internal memory constraint for my htc nexus one,

I found a few apps that quite worth to mention

1. Swype keyboard
2. Docs by Google documents
3. Analytics by Google analytic ( it has a widget app, pretty cool)
4. Google+ (now able to reshare a post via phone, previously can't)
5. handscent sms
6. xe - currency convert
7. Karl Mortage calculater (very useful for calculating mortage repayment, got chart and all)
8. Twitter for android. (the stock app by Twitter developer still the best, the rest are too complicated to use)
9. Foursquare for android.
10. Expensify (record and analyze your expenses with web browser support)