
Amante4's IDA Plugins - W32Dasm
style IDA add-ons (80k).
BinDiff v2 Evaluation Version -
Plugin for IDA for graphical DIFF'ing and binary analysis (6.79Mb's).
Delphi 6 & Delphi
7 signature files for recognition (691k & 797k).
FLAIR tools v4.9 for IDA - Fast
library recognition for IDA (1Mb).
Gerbay's Plugin - enables FLIRT
by loading obj/lib files (38k).
ida-x86emu -
IDA plugin for stepping through obfuscated code and updating the
disassembly, latest version 0.9.3.2 available here
(76k).
IDA to SoftICE Symbol Loader v0.02
- Mostek's IDA invaluable plugin (1.25Mb).
IDA idc Scripts - Courtesy of IDA
guru Mammon_ (65k).
IDA MFC 7.0/7.1/8.0
ordinal imports to meaningful names conversions, mirrored here (369k).
IDA SDK v4.1.4 - SDK for v4.1.4
kernel (402k).
IDA SDK v4.3 - SDK for v4.3.0.735
kernel (554k).
IDA SDK v4.5 - SDK for v4.5 (640k).
IDA SDK v4.7 - SDK for v4.7 (v4.7
Build 830) (4.08Mb's).
IDA SDK v4.9 - SDK for v4.9 (v4.8
Build 849 kernel) (6.37Mb's).
IDA SDK v5.0 - SDK for v5.0 kernels
(6.58Mb's).
IDA SDK v5.1 - SDK for v5.1 kernels
(7.10Mb's).
IDA SDK v5.2 - SDK for v5.2 kernels
(7.25Mb's).
IDA Utilities v5.2 - Flair v5.2,
idsutils v5.10, TVision, LoadInt v5.2 (2.08Mb's).
Procdump v1.62 IDB - Procdump IDB
released and commented by Rolf Rolles (365k).

IDA Palace -
Lots of useful plugins, guides and scripts for IDA.
IDA Plug-In
Writing in C/C++ - Introduction to writing IDA plug-ins by
Steve Micallef (530k).
IDA Tutorial by |nAbOo| - Must
read guide to using IDA for newbies (502k).
Hex Blog - Blog authored
by Ilfak.
http://quasar.astalavista.ms/idafw.html
- IDA Freeware resources.
IDAPython - Python integration
for IDA allowing scripts to be run (requires Python
to be installed).
iDefense Labs - A lot
of useful IDA extensions written by Pedram Amini, IDA SYNC especially
for those wishing to collaborate on an IDB using a central server.
v5.2
v5.1
v5.0
v4.9
v4.3
v5.2 (31st November 2007) & Hex-Rays v1.0
This is v5.2.0.098. Few details are known at the moment about this release, however identity theft seems a likely explanation.
v5.1 (9th October 2007)
This release is v5.1.0.899 and is a full advanced version licensed to 'GVU - Gerhard Uphoff'. Not much information has yet surfaced about this release, but as is per usual with IDA releases, an illegally obtained purchase or unfortunate customer seems the most likely explanation.

v5.0 (20th July 2006)
This release is v5.0.0.879 and is a full version licensed to 'Paul Ashton - Blue Lane Technologies', it seems likely to me this version was either shared or stolen and then leaked to the scene, oddly this also seems to be Pierre's synopsis as well. Some images I've retained for when they disappear from other parts of the web.
The initial ExeTools advertisement for the leak:
A screen grab of the directory:

Finally a whois of the domain:

A full explanation has now been provided by Ilfak in his Hall of Shame. It doesn't seem to have hurt Andre's career though ;-).
26th August 2006
DataRescue have decided fairly recently to close their Message Boards to public access, this seems likely to be a direct result of the wide-spread leaking of v5.0 to the scene, the desired effect of this decision is probably to try and snuff out support requests from pirates, yet this pretty much neglects the status quo since no-one who wasn't a legitamate customer could post any requests or download updates before anyway.
v4.9
This release of IDA is v4.9.0.863 (Datarescue.IDA.Pro.Advanced.v4.9.0.863.Russian.Retail.Cracked-ZWT if you are looking for something to plug into Google), this is apparently a legitamate Russian version released by a disgruntled end-user, when launching the program (under a non-Russian version of Windows) a message box will be displayed and IDA will then close. The best solution has been offered by a group called Lz0 under the name (DataRescue.IDA.Pro.Advanced.v4.9.0.863.PROPER.FIX.READ.NFO-Lz0), their fix ships the following files to replace :
ida.wll
ida64.wll
idag.exe
idag64.exe
idau.exe
idau64.exe
idaw.exe
idaw64w.exe
I have not 'extensively' tested this fix, but the nfo file mentions 2 names I do know fairly well so I'd be inclined to trust it unless information surfaces to suggest otherwise.
v4.3.0.740 (12-1-3)
This release of IDA is v4.3.0.740 (DataRescue.IDA.Pro.Advanced.V4.3.0.740.RETAIL.READNFO-ZENiTH). This is apparently a leaked copy with a license in the name of 'Roger Cross', updated files patch the license to the name of Thomas Wright (DVDMods), apparently once a legitamate customer, this release is notable as being the first to claim that DataRescues watermarking scheme could be overcome, Pierre later confirmed over 200 watermarks still remained.