Watch this space - vital Android apps (according to me)

This is just to get things started, these are the best apps of their kind, and essential to my daily use of Android:

Core application replacements / enhancements

Enhanced Email - improved Exchange client. If you need multiple Exchange accounts, or a mix of Exchange and Google Apps / Gmail in the same place, this is for you. (requires Contact Editor by dmfs as well).

Calengoo - replacement calendar; brilliant!!

Calendar Snooze - better control over calendar reminders.

MeContacts - "favorites" app for frequent contacts.

Contapps - another spin on the dialer, with some very handy functions.

Tasks for Microsoft Exchange (or Roadsync) - if you want to sync Todos with Exchange.

Go Launcher EX - excellent alternative launcher.

Alarm Clock Plus - just what it sounds like.

Life productivity apps

ToMarket - shopping list manager.

Carrr Matey - "dude, where's my car?" only better!

Shazam / Soundhound - let it "listen" to a song and it'll tell you what it is, who sang, it, etc., etc.

Functional enhancements

B-Folders - encrypted notes that sync between Android and PC over local wireless.

Evernote - data capture of all types; sync'd to web and PC.

Movies (Flixter) - movie reviews from Rotten Tomatoes, showtimes, reviews, etc.

Documents To Go - Word, Excel, Powerpoint, PDF.

Jukefox - interesting and powerful music player.  Caused some instability on my G2x, but interesting for the future, nonetheless. 

Utilities

Beautiful Widgets - I resisted a long time, but the small home screen clock/weather widget, and the 1x1 day widget are dead useful if you have a phone without Sense.

Circle Battery Widget - a very nice, easy to use 1x1 battery meter.

Battery Notifier (Big Text) - puts the battery level in the notification bar where you can always see it.

Wifi Manager - much better/clearer widget to manage wifi connections.

Bluetooth Widget - home screen shortcut to toggle Bluetooth, or access Bluetooth settings.

Astro File Manager - file explorer.

More detail (links, reviews, etc.) to follow.