ErrethAkbe:
You haven't said what your Amiga specs are. What ROM/WB? Do you have a graphics card?
Here is my list - for ECS, 3.0 ROM, WB 3.1. (sorry, it's a little more than 5, but it's still only a partial list!)
Workbench/Tools
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File manager - ABCDir
WB look improvement - VisualPrefs, Newicons, Magic Menu, TitleShadow, Borderblank
Screen promotion - ModePro
WB palette lock - LoadCMAP
Speedup Patch - SystemPatch
Icon editor - Iconian (2.98r - later versions unstable)
Window tool - WindowToFront, Iconify
Text clip - PowerSnap
Path/Filename clip - Clip (use in ABCdir)
Drive click stop - DrivePrefs
Full screen shell - ScreenShell
Benchmark - AIBB
File finder - SimpleFind3
Disk salvage - DiskSalv 4
Application Monitor - SnoopDOS
Add to WB tools menu - AddTools
System Monitor - Scout
Binary Editor - Hex
AntiVirus - VirusZ
Archive - Wizarc
UnArchive - Voodoo-X/XAD
Screen Magnifyer - Zoom
Screen saver - Matrix
Command line run from icon - runfromwb (same as double-clicking!)
Sound datatype - SoundDT41
Calculator - TotalCalc
Internet
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TCP/IP Stack - MiamiDX
Browser - IBrowse
Email - YAM
Messenger - Jabberwocky
Development
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C/C++ - SAS/C 6.58
BASIC - AMOS Pro Compiler
Assembler - Asm-One
GUI - MUI, Feelin
Music
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Tracker - OSS/Protracker4
Sampler - DSS-3
Disk Sample player - SongPlayer
Disk Sample editor/converter - SampleZ
MP3 player - DiamondGUI/Mpega
Multi-format music/SID player - EaglePlayer 2.03
Application
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Wordprocessor - FinalWriter 97 / Wordworth 7
Spreadsheet - TurboCalc
Organiser - Organiser
Paint Programs - ImageFX, PPaint 7.1, PPT
JPEG viewer - fjpeg 1.1
Image viewer - Visage
Text Editor - MicroGoldEd
PDF read - Apdf 2.2
PDF print/create - Ghostscript 8
Fax - STfax 4.1
Mac Emulator - Shapeshifter 3.11
Database & GUI - XBaze
Home finance - HomeBank
Presentation - Scala MM400
I use all these and more on my A500. Most are freely available on Aminet.