Best of the Internet:

best of the internet

You’re in luck! You’ve just found a directory of the best hand-picked FREE engineering tools on the internet! This list is regularly updated with new sites being added to the bottom of each category, so bookmark this page for future reference!

EngineerDog loves sniffing out the best resources on the internet , so let me know what your favorite sites are!

 **Last Updated: Janurary 2016, Lots of additions!

***MACHINING & FABRICATION***
1
Tube Bending Calculator: Tells you how to measure structural tubing for bending. 
2
Cut List Calculator: Tells you the most efficient method of cutting bar stock to minimize waste. 
3
Tolerances and Fits Calculator: Tells you how to size shafts and holes to achieve the desired fit. 
4
Concise Welding Symbols chart
5
Machining Feed & Speed Calculator
6
Easily design layouts for laser cut boxes
.
***BUSINESS TOOLS***
7
Testing Specifications: ASTM (Use google translate)
8
Testing Specifications: ANSI, Mil, SAE Specs and more
9
Info summary on any company:  # employees, revenue, age, etc. 
10
Website SEO report (1 free review/week!)
11
Website stats and valuation 
12
Website Domain Authority Checker
13
Temporary Email Address  (alternative method)
14
Comparison shop for optimum shipping rates
15
Share your screen with anyone over the web.
16
Send a fax without a fax machine
17
Send a fax without a fax machine
18
Official Free Browser Based Version of Microsoft Office
19
Edit pdfs for free online
20
Huge database of free custom fonts online
21
Send anonymous emails (Hello Boss…)
22
Mail your enemy a piece of shit in a box (Yes, this is how I do business)
23
Mail your enemy an envelope full of glitter (OMG yes)
24
Anon wake up phonecall for yourself (or that enemy)
25
Pdf to DXF converter (20 free uses)
26
HashTag Selection Optimizer (use in table mode)
27
Make your own graphpaper
28
Printable Planner Organizer System
29
Remove backgrounds from photos
.
***FASTENER CHARTS & REFERENCES***
30
Best Online Fastener Sizing Chart
31
Shoulder bolt dimensions and strength
32
Online tap drill chart- Tells you what size to predrill tapped holes
33
Table of NPT Thread Sizes
34
Printable fastener sizing layover charts
.
***MATERIAL REFERENCES***
35
Sheet metal thickness gage chart
36
Custom Spring Calculators-Design the exact spring you need
37
Material properties For everything
.
***ONLINE 3D MODELS***
38
McMaster Carr: wide array of 3d models, go-to for hardware
39
GrabCAD: Huge database of user submitted models
40
3DContentCentral:  Database of user submitted models
41
Misumi: 3d models of small mechanical parts
42
3d models of gears
43
Google Sketchup Model Database
.
***SOFTWARE DESIGN TOOLS***
44
Diagram editor: Great for drawing flow charts 
45
Octave: an opensource alternative to Matlab
46
Draw the floorplan of your house, arrange furniture, see results in 3D.
47
Electronic Wiring / Analog Circuit CAD
48
Panda Antivirus software (What I use)
49
Helps your computer startup faster
50
Finds accidentally deleted files. 
51
Circuit simulator
52
2D Drafting CAD similar to autocad
53
‘Ccleaner’ computer cleaner and speed booster software
54
PCB Design software
55
Free Parametric 3D modeling software (good for programmers)
56
Free Ladder Logic Software (the actual PLC is only $70)
57
Desktop Unit conversion  tool
58
Fritzing for documenting arduino & other circuit schematics
59
Free online image vectorizer: convert JPEG to DXF
60
Gear Design Tool (Some is free but has paid component too)
 
***3D PRINTING SOFTWARE TOOLS***
61
Free online 3D model file converter: stl to obj to ply
62
STL File Viewer that lets you make measurements
63
STL FILE Editor: Meshmixer
64
STL File 3d model Voronoi effect editor: voronator
65
Slic3r 3D printing slicing software
66
Repetier Host, 3D printing Gcode Generator & Printer UI
67
Lathe-R-Beam Spins 2d Drawing around axis & creates STL File
68
Cura: Combined slicing, g-code generating, & UI for 3d printers
69
OctoPrint-Remotely monitor your 3D printer
70
Super Simple parametric gear model STL generator
71
Onshape 3d modelling program
72
TinkerCAD 3D modelling program
73
OPENSCAD Parametric 3D modelling Program
74
DesignSpark Mechanical 3D modelling program
75
FREECAD Parametric 3D modelling Program
76
Blender 3D Sculpting program
77
Fusion 360 3D Modelling
78
2.5D control software: CNC Router/laser/ plotter G-code generator & UI 
79
Deltabot 3D Printer position calculator
80
Laser Web- Free software toolchain for laser cutters & engravers
80
.
***OUTSOURCING FABRICATION***
81
Find a local DIY 3D printing service
82
Find a local DIY CNC, CAD, or 3D printing service
83
Find a local DIY CNC, CAD, 3D printer, Laser fabrication service
84
Online waterjet cutting (Instant free quotes)
85
Online laser cutting, 3D printing, & metal machining service.
86
Buy bulk Chinese products cheap and resell for profit
87
Timing Belt Center Distance Calculator
.
***OTHER NOTEWORTHY***
88
Learn any language free
89
Shorten Long Urls
90
Online Stopwatch
91
Easily make a screencast video
92
Online super calculator (does algebra too)
93
Online Interpolation Calculator
94
Find websites similar to ones you know you like
95
Find books/music/movies similar to ones you know you like
96
Google Keep: Free synced notes between computer & phone
97
Find the original URL that’s hiding behind a short URL.
98
Website Name Availability Checker (Finds similar options for you)
99
507 Mechanical Movements: See various linkages in motion
100
Can You run it, automatic system requirements checker for games. 
101
Free OpenSource Password Keeper
***PERSONAL FINANCE***
102
Simple/Effective Investing Savings Calculator
103
Simple/Effective Home Buy vs Rent Calculator
104
Free Credit Scoring that doesn’t affect your score to check. 

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