[Optimus One, P500, V Themes and Apps] Ianis G. Vasilev:
The best Android apps in my opinion are:

(Sorted randomly)

1. Superuser - The base application for root access in almost all Linux distributions.

2. Titanium Backup - An easy to use, yet advanced backup manager. I love to experiment with different ROMs and this app simply makes it very easy to restore all my applications. Another useful function is the ability to remove bloatware from the ROM without the need to manually clean application's apk and data.

3. Root Explorer - Another great app. Very useful for modifying system folders and extracting/compressing ZIPs (even APKs).

4. ClockSync - A simple application to synchronise your clock with any NTP time server (I'm using time.nist.gov on all my computers).

5. NetQin Antivirus - A free, yet powerful antivirus program. Simply scans everything and integrates an anti-thief technology. I preffer it to all Android antivirus software I've ever found.

6. SetCPU - Advanced CPU clock speed and governor manager. Can be set to automatically change its configuration whenever an event is triggered - events include "Screen Off", "Charging", "Charging AC", "Charging USB", "Battery <", "Temp >".

7. DroidWall - A simple firewall with a seperate management of WiFi and GPRS/HDSPA networks.

8. iGO - An exelent GPS program, very costumisable, with support for diffent vehicle types and voice notifications.

9. ZipSigner - A simple application for signing ROM updates (in ZIP format)

10. Super Task Killer - Another product by NetQin. Simply kills tasks to free up memory.

11. NetQin Mobile Manager - Great app, a few useful tools - for example unwanted call blocker and GPS speed meter.

12. Compass - Advanced compass, functions include location, phone rotation andgle and both magnetic and geographic compass.

13. Catch Notes - Very good notetaking software. Supports hypertext, tags, location, images, synchronization with Catch.com and exchange location with the Compass app (in this list).

14. Scrollable News - Simple news widget. Lacks OPML support and Google Reader synchronizaion, but I like the way it looks on my screen.

15. MailDroid - Excelent e-mail application. Supports POP3, SMTP, IMAP Pust and WebDav protocols, signatures, sender names, images, attachments, search... In other words, works great with Hotmail and Gmail.

16. WifiWidget - Nice WiFi widget with access to the integrated Android WiFi settings.

17. Vital Player - Great video player, supports usage of both hadrware and software codecs (H.264, WMV, OGG...), supports high resolutions and subtitles.

18. PowerAMP - Simply the best music player for Android. Features include a wide array of supported formats, a great graphical equaliser, album art functions, folder management and advanced search and sorting.

19. Terminal Emulator - The best android terminal application, nothing to add.

20. Alarm Master Lite - Simple alarm manager, supports many alarms, custom ringtones and quick enabling/disabling alarms.

21. Color Flashlight - Advanced flashlight, adjustable brightness, different textures.

22. Copy/Paste - Screenshot OCR software, currently in beta.

23. Dolphin Browser HD - Many advanced functions, many plugins, supports certificates, wide array of protocols, gestures, themes, simple histrory/cache/form data/cookie cleaner.

24. Autostarts - Manage autostart applications on different events.

25. AdFree - Redirects known ad servers to a custom IP adress (By default 127.0.0.1), removing ads from adware.

26. gStrings - A great musical instrument tuner, I use it almost every day and I'm very satisfied.

27. OfficeSuite Pro - A full-featured office suite. Support for Microsoft Office 2007 formats, advanced text features, in-document search and is able to load large documents.

28. QuickMark - Barcode scanner and generator. Supports scanning codes from files, web pages and the phone camera. Barcode formats include Ean8, Ean13, Code39, Code128, QR codes and QuickCode.

29. QuickPic - Performance-orientated replacement for the Android Gallery. It also includes a feature that adjusts the screen brightness automatically while viewing images.

30. ADW.Launcher - Themes, scrollable widgets, very costumisable, simply the best home screen replacement (In my opinion).