Inspired by this site:
http://mattzz.no-ip.org/wiki/Projects/DekoSoftwareLinks
I decided to create my own list (little extended). many software from this list is obsolete anyhow all of this is great part of diving history so enjoy
If anyone is using something else make a comment or PM me

[(Excel) CDM-18 Dive Profile Analyzer]
[(Excel) DECO Divers Dive Planner (IANTD tables)]
[(Excel) Dive Profile Analyzer v1.01R4]
[(Excel) GVE Deep Stop Calculator v2a]

[Abyss Planner v2.30.17]
[Adept Dive Planner (ADP) v2.2]
[Ambient Pressure Diving AP Projection SPORT v2.1.7.5]
[ANDI DivePlanner v1.2]
[ANDI Gap Dive Planner v2.3.1665]
[ANDI Gap Dive Planner v3.0.425.7]
[Blue Ocean]
[Casuarina Dive Planner (CDP) v1.0]
[DCAP v6.7 (Diving Computational Analysis Program)]
[DDPLAN v2.15]
[DECOCALC]
[DecoChek v2.11]
[DECOM For DOS v6.6.1]
[DECOM For Windows - Technical Diver v1.0.1]
[Decotrainer v3.12]
[Dekogen 7]
[DekoPro v1.0]
[Departure v9.9.0]
[dipplanner v0.3a]
[Dive Plan Calculator v3.1.1]
[DIVE v2_99]
[DIVE v3_01]
[DiveComp v2.0a]
[DiveComp v2.5 for DOS]
[DiveComp v3.13]
[divePAL v1.5.8]
[DivePlan v3.04]
[DivePlanner 97]
[DiveTableX v2.0 [MAC]]
[DODeco v1.0]
[DPA v2.1 (Dive Profile Analysis)]
[Dr. X's Dive & Deco Planner v5.03]
[Erik Baker's Fortran Program (Compiled)]
[FreePlanner v1.0]
[GAP v1.2 build 298]
[GAP v2.3.1665]
[GAP v3.0.425.6]
[G/PLAN v1.0 (GUI for ZPlan)]
[GtkDive v0.71]
[GUE DecoPlanner v2.0.49]
[GUE DecoPlanner v3.1.4]
[Heliox Tachyon Simulator]
[HLPlanner v1.0.2314]
[JDeco v4.0]
[M-Plan v1.03]
[Mareblu v1.1.0000]
[MiG Plan v1.02]
[MultiDeco v4.14]
[Multilevel v1.9]
[MV Plan v1.5.2]
[NAP v1.0b (Nitrogen Absorption Program) for Windows]
[NAP v2.2 (Nitrogen Absorption Program) for DOS]
[NAUI GAP Dive Planner v2.3.1665]
[NAUI GAP Dive Planner v3.0.425.8]
[NAUTILUS Dive Planner v1.3.1]
[OneStop Decompression Software v1.1.5562.21626]
[OpenDivePlan v0.2.5]
[OSTC Planner v3.00.14 BETA]
[PastoDeco v4.4.0]
[Pro Planner v7.12C]
[Scuba Diving Calculators v9.0]
[ScubaWorks R2 demo]
[SIRENA v4.2]
[Soylent Blue]
[SSI Altitud Diving v1.0.0]
[Tauchsoft by Jürgen Poniatowski]
[Tausim v0.99]
[TruDive v1.0]
[Trust Trimix v2.2.19]
[UDT Dive Planner for the DCIEM Tables v2.60]
[Ultimate Planner v1.88]
[V-Planner v3.100]
[VGM ProPlanner v3 (Variable Gradient Model)]
[Visual Decompression v3.1.0]
[Voyager 2000 v2.08.2]
[Voyager Desktop Decompression System v1.32]
[VPM]
[VPMOpen v1.4.2]
[WinGUI v1.1 for ZPlan v1.03]
[XS for Windows]
[YADI - Yet Another DivePlanner v1.1.0.38]
[Z-Planner v1.01.16]
[ZPlan v1.03]