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: March 2017, Lots of additions!

Source & Description/Link
***MACHINING & FABRICATION***
1 Tube Bending Calculator: Tells you how to measure structural tubing for bending.  http://www.benditonline.com/
2 Cut List Calculator: Tells you the most efficient method of cutting bar stock to minimize waste.  http://jonathan.overholt.org/projects/cutlist
3 Tolerances and Fits Calculator: Tells you how to size shafts and holes to achieve the desired fit.  http://www.amesweb.info/FitTolerance/FitToleranceImperial.aspx
4 Concise Welding Symbols chart http://www.jit-mfg.com/WeldSymbolsProof.pdf
5 Machining Feed & Speed Calculator http://www.daycounter.com/Calculators/GCode/Feed-Rate-Calculator.phtml
6 Easily design layouts for laser cut boxes http://boxmaker.connectionlab.org/
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***BUSINESS TOOLS***
7 Testing Specifications: ASTM (Use google translate) http://wenku.baidu.com/
8 Testing Specifications: ANSI, Mil, SAE Specs and more http://www.everyspec.com/
9 Info summary on any company:  # employees, revenue, age, etc.  http://www.manta.com/
10 Website SEO report (1 free review/week!) http://www.woorank.com/
11 Website stats and valuation  http://www.cutestat.com/
12 Website Domain Authority Checker http://checkpagerank.net/
13 Temporary Email Address  (alternative method) http://10minutemail.com/
14 Comparison shop for optimum shipping rates https://shipgooder.com
15 Share your screen with anyone over the web. https://www.join.me
16 Send a fax without a fax machine http://faxzero.com/
17 Send a fax without a fax machine http://www.gotfreefax.com/
18 Official Free Browser Based Version of Microsoft Office https://office.live.com/start/default.aspx
19 Edit pdfs for free online http://www.pdfescape.com/
20 Huge database of free custom fonts online http://www.fontspace.com/
21 Send anonymous emails (Hello Boss…) https://www.guerrillamail.com/
22 Mail your enemy a piece of shit in a box (Yes, this is how I do business) http://www.shitexpress.com/
23 Mail your enemy an envelope full of glitter (OMG yes) https://shipyourenemiesglitter.com/
24 Anon wake up phonecall for yourself (or that enemy) https://wakerupper.com/
25 Pdf to DXF converter (20 free uses) http://www.aidecad.com/pdf-to-dxf-converter.html
26 HashTag Selection Optimizer (use in table mode) http://hashtagify.me/hashtag/3dprint
27 Make your own graphpaper http://incompetech.com/graphpaper/
28 Printable Planner Organizer System http://www.diyplanner.com/templates/official/classic 
29 Remove backgrounds from photos https://burner.bonanza.com/
30 Buy & Print USPS Shipping Label free from home (Paypal) https://www.paypal.com/us/cgi-bin/webscr?cmd=_ship-now
.
***FASTENER CHARTS & REFERENCES***
31 Best Online Fastener Sizing Chart http://www.designrise.com/tools/fasteners/index.php
32 Shoulder bolt dimensions and strength http://www1.mscdirect.com/PDF/FASTENERS/SocketHeadShoulderScrews.pdf
33 Online tap drill chart- Tells you what size to predrill tapped holes http://physics.ncsu.edu/pearl/Tap_Drill_Chart.html
34 Table of NPT Thread Sizes http://www.engineeringtoolbox.com/npt-national-pipe-taper-threads-d_750.html
35 Printable fastener sizing layover charts https://www.boltdepot.com/fastener-information/Printable-Tools/Default.aspx
.
***MATERIAL REFERENCES***
36 Sheet metal thickness gage chart http://www.unc.edu/~rowlett/units/scales/sheetmetal.html
37 Custom Spring Calculators-Design the exact spring you need http://www.allrite.com/inventory/design-a-spring
38 Material properties For everything http://www.matweb.com/
.
***ONLINE 3D MODELS***
39 McMaster Carr: wide array of 3d models, go-to for hardware http://www.mcmaster.com/#
40 GrabCAD: Huge database of user submitted models https://grabcad.com/home
41 3DContentCentral:  Database of user submitted models http://www.3dcontentcentral.com/default.aspx
42 Misumi: 3d models of small mechanical parts http://us.misumi-ec.com/
43 3d models of gears http://www.sdp-si.com/eStore/CoverPg/Gears.htm
44 Google Sketchup Model Database https://3dwarehouse.sketchup.com/index.html
.
***SOFTWARE DESIGN TOOLS***
45 Diagram editor: Great for drawing flow charts  http://sourceforge.net/projects/dia-installer/
46 Octave: an opensource alternative to Matlab https://www.gnu.org/software/octave/
47 Draw the floorplan of your house, arrange furniture, see results in 3D. http://www.sweethome3d.com/
48 Electronic Wiring / Analog Circuit CAD http://tinycad.en.softonic.com/
49 Panda Antivirus software (What I use) http://www.pandasecurity.com/usa/homeusers/solutions/free-antivirus/
50 Helps your computer startup faster https://www.malwarebytes.org/startuplite/
51 Finds accidentally deleted files.  http://www.piriform.com/recuva
52 Circuit simulator http://www.linear.com/designtools/software/#Ltspice
53 2D Drafting CAD similar to autocad http://www.3ds.com/products/draftsight/download-draftsight/
54 ‘Ccleaner’ computer cleaner and speed booster software http://www.filehippo.com/download_ccleaner/
55 PCB Design software http://www.cadsoftusa.com/
56 Free Parametric 3D modeling software (good for programmers) http://www.openscad.org/
57 Free Ladder Logic Software (the actual PLC is only $70) http://www.automationdirect.com/adc/Overview/Catalog/Software_Products/Programmable_Controller_Software/CLICK_PLC_Programming_Software
58 Desktop Unit conversion  tool https://joshmadison.com/convert-for-windows/
59 Fritzing for documenting arduino & other circuit schematics http://fritzing.org/download/
60 Free online image vectorizer: convert JPEG to DXF http://www.autotracer.org/
61 Gear Design Tool (Some is free but has paid component too) http://www.woodgears.ca/gear_cutting/template.html
62 Free source code editor, useful for programming https://notepad-plus-plus.org/
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***3D PRINTING SOFTWARE TOOLS***
63 Free online 3D model file converter: stl to obj to ply http://www.meshconvert.com/
64 STL File Viewer that lets you make measurements http://www.3d-tool.com/en_free-viewer-download.htm
65 STL FILE Editor: Meshmixer http://www.123dapp.com/meshmixer
66 STL File 3d model Voronoi effect editor: voronator http://www.voronator.com/
67 Slic3r 3D printing slicing software http://slic3r.org/
68 Repetier Host, 3D printing Gcode Generator & Printer UI https://www.repetier.com/download-now/
69 Lathe-R-Beam Spins 2d Drawing around axis & creates STL File https://github.com/makenai/Lathe-R-Beam
70 Cura: Combined slicing, g-code generating, & UI for 3d printers https://ultimaker.com/en/products/cura-software
71 OctoPrint-Remotely monitor your 3D printer http://octoprint.org/
72 Super Simple parametric gear model STL generator http://joostn.github.io/OpenJsCad/
73 Onshape 3d modelling program https://www.onshape.com/
74 TinkerCAD 3D modelling program https://www.tinkercad.com/
75 OPENSCAD Parametric 3D modelling Program http://www.openscad.org/
76 DesignSpark Mechanical 3D modelling program https://www.rs-online.com/designspark/mechanical-software
77 FREECAD Parametric 3D modelling Program http://www.freecadweb.org/
78 Blender 3D Sculpting program https://www.blender.org/
79 Fusion 360 3D Modelling http://www.autodesk.com/products/fusion-360/students-teachers-educators
80 2.5D control software: CNC Router/laser/ plotter G-code generator & UI  http://www.estlcam.com/
81 Deltabot 3D Printer position calculator http://www.thinkyhead.com/_delta/
82 Laser Web- Free software toolchain for laser cutters & engravers http://hackaday.com/2016/12/23/convert-that-cheap-laser-engraver-to-100-open-source-toolchain/
83 Open Source Vector Graphics Editor (like Adobe Illustrator) https://inkscape.org/en/
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***OUTSOURCING FABRICATION***
84 Find a local DIY 3D printing service www.3dhubs.com
85 Find a local DIY CNC, CAD, or 3D printing service http://www.makexyz.com/
86 Find a local DIY CNC, CAD, 3D printer, Laser fabrication service http://www.100kgarages.com/
87 Online waterjet cutting (Instant free quotes) http://www.bigbluesaw.com/
88 Online laser cutting, 3D printing, & metal machining service. https://www.ponoko.com/
89 Buy bulk Chinese products cheap and resell for profit http://www.globalsources.com/
90 Timing Belt Center Distance Calculator https://sdp-si.com/eStore/CenterDistanceDesigner
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***OTHER NOTEWORTHY***
91 Learn any language free https://www.duolingo.com/
92 Shorten Long Urls https://bitly.com/
93 Online Stopwatch http://www.online-stopwatch.com/
94 Easily make a screencast video https://www.screenr.com/
95 Online super calculator (does algebra too) http://www.wolframalpha.com/
96 Online Interpolation Calculator http://www.johndcook.com/interpolator.html
97 Find websites similar to ones you know you like http://www.similarsites.com/
98 Find books/music/movies similar to ones you know you like https://www.tastekid.com/
99 Google Keep: Free synced notes between computer & phone https://www.google.com/keep/
100 Find the original URL that’s hiding behind a short URL. unfurlr.com – find the original URL that’s hiding behind a short URL.
101 Website Name Availability Checker (Finds similar options for you) http://www.namemesh.com/
102 507 Mechanical Movements: See various linkages in motion  http://507movements.com/
103 Can You run it, automatic system requirements checker for games.  http://www.systemrequirementslab.com/cyri
104 Free OpenSource Password Keeper http://keepass.info/
105 Make Screen Casts for free. https://obsproject.com/
106 Convert Photo Image to look like a cartoon/drawing http://www.picturetopeople.org/image_effects/photo_cartoon/photo_cartoon.html
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***PERSONAL FINANCE***
107 Simple/Effective Investing Savings Browser Calculator (Dave Ramsey) http://www.daveramsey.com/article/investing-calculator/lifeandmoney_investing/#/entry_form
108 Simple/Effective Home Buy vs Rent Browser Calculator (NYT) http://www.nytimes.com/interactive/2014/upshot/buy-rent-calculator.html?_r=2&&abt=0002&abg=1
109 Free Credit Scoring that doesn’t affect your score to check.  www.creditkarma.com
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***Online Materials Suppliers***
110 Cheap Supplier of various metal raw material  https://www.metalsdepot.com/
111 Cheap Supplier of various metal raw material  https://www.speedymetals.com
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***Engineering/Maker Newsletters***
112 Engineering, design, and business. Interesting & insightful blog articles.  https://www.fictiv.com/blog
113 Instructables newsletter, how to guides & project ideas https://www.instructables.com/
114 Hackster.I.O, hacked hardware projects & ideas.  https://www.hackster.io/
115 Make Magazine standard newsletter http://makezine.com/
116 Maker Pro Newsletter, my favorite one http://makezine.com/tag/maker-pro/

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