Links
Web-Design
Wordpress-Themes - free
https://wordpress.org/themeshttps://wordpress.com/themes/free
https://nicepage.com/wordpress-themes
https://colorlib.com/wp/free-wordpress-themes
https://www.templatemonster.com/de/kostenlose-wordpress-themes.html
https://www.hostinger.com/tutorials/best-free-wordpress-themes
https://www.drweb.de/beste-wordpress-themes-kostenlos
Wordpress-Themes - paid
https://themeforest.net/category/wordpresshttps://www.elegantthemes.com/gallery/divi
Bootstrap-Themes - free
https://bootstrapmade.comhttps://themes.getbootstrap.com
https://startbootstrap.com
https://bootswatch.com
https://themes.3rdwavemedia.com/freebies
https://bootstrapmart.com
https://themefisher.com/free-bootstrap-templates
Bootstrap-Themes - paid
https://wrapbootstrap.comhttps://themefisher.com/bootstrap-templates
Hugo-Themes - free
https://themes.gohugo.iohttps://hugothemesfree.com
https://cloudcannon.com/blog/fifty-of-the-most-popular-hugo-themes
https://gethugothemes.com/free-hugo-themes
https://themefisher.com/best-hugo-themes
Images - free
https://pixabay.comhttps://www.pexels.com
https://icon-library.com
https://www.freeimages.com
https://unsplash.com
https://www.shutterstock.com
https://www.gettyimages.de
https://search.creativecommons.org
Corporate Design
https://www.wirk-raum.de/diemachtderfarbenhttps://speckyboy.com/corporate-identity-mockup-templates
https://www.designbombs.com/best-online-color-palette-generators
Layout - CSS - Grid Builder
https://www.layoutit.com/buildhttps://grid.layoutit.com
https://angrytools.com/css-generator
https://www.codeply.com
https://cssgrid-generator.netlify.app
https://griddy.io
https://vue-grid-generator.netlify.app
https://css-grid-layout-generator.pw
Website optimization
https://www.ssllabs.com/ssltesthttps://gtmetrix.com
https://pagespeed.web.dev
https://ahrefs.com/backlink-checker
https://www.experte.de/pagespeed
https://moritzbauer.com/google-ranking-check
Search engine optimization
https://www.google.de/mybusinesshttps://www.bingplaces.com
https://businessconnect.apple.com/
https://www.tomtom.com/mapshare/tools
https://mapcreator.here.com
https://www.waze.com/live-map
https://foursquare.com
https://www.onosm.org
https://www.poibase.com
https://www.hotfrog.com
https://www.oeffnungszeitenbuch.de
https://www.yalwa.com
https://koomio.com
https://stadtbranche.de
https://www.unternehmensauskunft.com/neuer-eintrag.html
https://www.goyellow.de
https://loocal.de
https://www.golocal.de
https://eintragen.branchenbuchdeutschland.de
https://www.infobel.com
https://www.dialo.de
https://www.marktplatz-mittelstand.de
https://www.brownbook.net/free-listing
https://wogibtswas.de
https://www.bundes-telefonbuch.de
https://www.business-branchenbuch.de
https://www.stadtbranchenbuch.com
https://www.goodmonday.de
https://www.branchenverzeichnis.org
https://www.dasoertliche.de
https://www.european-business-connect.de
https://www.regional.de
https://www.gewusst-wo.de
https://www.gucknach.de
https://www.webfee.de
http://www.verlink-dienst.de
https://www.11880.com
https://suchnase.de
https://www.webinhalt.de
https://www.firmenindex-deutschland.de
https://www.wlw.de
https://www.yelp.de
https://web2.cylex.de
https://www.firmenfinder.net
https://www.gelbeseiten.de
https://www.weshoplocal.de
https://www.nochoffen.de
https://www.acompio.com
https://www.finderr.de
https://www.ortsdienst.de
https://www.dastelefonbuch.de
https://find-open.co.uk
https://finde-offen.de
https://www.oeffnungszeiten.com
https://www.iglobal.co
https://www.ruhrlink.de
https://www.tripadvisor.de
https://www.pflegedienst-online.info/index.html
https://www.xing.com
https://www.facebook.com
IT Security
Tools
https://www.nirsoft.nethttps://haveibeenpwned.com
https://www.cvedetails.com
https://www.virustotal.com/
https://virusscan.jotti.org
https://www.shodan.io
https://www.exploit-db.com
https://0day.today
https://vulners.com
https://www.rapid7.com/db
https://downforeveryoneorjustme.com
https://www.proxysite.com
https://www.yougetsignal.com/tools/open-ports
https://nmap.online
https://nmap.org/download.html
https://openvas.org
https://www.metasploit.com
https://www.snort.org
Documentation
https://owasp.orghttps://seclists.org
https://hackertarget.com/nmap-cheatsheet-a-quick-reference-guide
https://highon.coffee/blog/penetration-testing-tools-cheat-sheet
https://www.antionline.com
https://www.reddit.com/r/redteamsec
https://www.reddit.com/r/blueteamsec
https://www.privacy-handbuch.de
https://www.cisecurity.org/cybersecurity-best-practices
https://ncp.nist.gov/repository
https://www.bsi.bund.de/DE/Themen/Unternehmen-und-Organisationen/Standards-und-Zertifizierung/IT-Grundschutz/IT-Grundschutz-Kompendium/it-grundschutz-kompendium_node.html