Links (electronics mostly)

ELECTRONICS PROJECTS/SCHEMATICS/CIRCUITS/PARTS:

http://diy-electronic-projects.com/
http://circuitsarchive.org/index.php/Main_Page
http://circuit-diagrams.com/
http://electronic-circuits-diagrams.com/
http://electronicsteacher.com/list-of-schematics/
http://electroschematics.com/
http://ee.washington.edu/circuit_archive/circuits/
http://free-electronic-circuits.com/
http://circuitscout.com/
http://free-schematic.blogspot.com/
http://schematics.dapj.com/
http://eleccircuit.com/
http://sentex.ca/~mec1995/circ/circuits.htm
http://zen22142.zen.co.uk/schematics.htm
http://merakit.com/ | RF schematics/projects.
http://qrp.pops.net/wwv_receiver.asp | RF schematics/projects. (Offline? Check later and fix link)
http://opencircuits.com/Salvage_Parts_and_Sources | Salvage Parts and Sources

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GENERAL ELECTRONICS:

http://rfcafe.com/references/electrical.htm | Electrical / Electronics Conversions Formulas & References - RF Cafe | Lots of info on RF Electronics.
http://electronicsteacher.com/ | Electronic Tutorials, Electronic Kits, Electronic Tutorials,Electronic Hobby Kits, News | Some info about general electronics, not much.
http://dapj.com/ | dapj Tech - Digital Analog Power Junction | General electronics, not much.
http://electronics-tutorials.ws/ | Basic Electronics Tutorials and Revision | Tutorials on Electronics, not the best quality but very concise.
http://maximintegrated.com/design/ | Design Support - Maxim | Lots of info, design tutorials/tips, good quality.
http://sentex.ca/~mec1995/ | Tony's Website! Schematics, Circuit Diagrams, Projects, HV, Building, Kits, Tesla, Marconi, 555, R/C, Electronics-Tutorials | Good quality, projects, tutorials, etc.
http://electronicdesign.com/ | Electronic Design Home Page | Lots of excellent quality design info and tutorials.
http://opencircuits.com/Main_Page | Open Circuits | Projects, ideas, etc.

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INTERESTING:



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REFERENCES:

http://rapidtables.com/ | Online Reference & Tools - RapidTables.com | References on electronics, maths, some calculators, etc.
http://classiccmp.org/rtellason/logos/semiconductorlogos.html | Semiconductor Manufacturer Logos
http://dibsplace.com/design/ICLogos.htm | Vendors and Logos

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BLOGS:

http://eevblog.com/ | EEVblog (Video Blog)
http://baudaeletronica.blogspot.com.br/ | Baú da Eletrônica (Portuguese)
http://badulaquesdachina.blogspot.com.br/ | Badulaques da China (Portuguese)

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PROGRAMMING:

http://quicklycode.com/ | Cheat sheets and programming resources - QuicklyCode
http://keithschwarz.com/interesting/ | Archive of Interesting Code
http://freetechbooks.com/ | Free Online Computer Science and Programming Books, Textbooks, and Lecture Notes
http://apostilando.com/pagina.php?cod=1 | O Maior Site de Apostilas da Internet!!! (Portuguese)

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OTHERS:

http://opensourceautomation.com/ | Open Source Automation - Automation software for the home and more.
http://smithsonianchips.si.edu/ | Smithsonian - The Chip Collection | Lots of history of ICs, computers and electronics.