Great projectcs on the web:
www.diypowerwalls.com - Forum to answer all your questions about this topic.
www.youtube.com/results?search_query=diy+powerwalls -> YouTube.com -> DIY powerwall projects
OpenSource Linux things:
VestaCP - Free and Open Source controle panel for webhosting (Great, simple and easy to install!)
ehcp.net - Easy Hosting Controle Panel
ISPConfig - Manage Your Servers Directly Through Your Browser - autoinstaller, Let's Encrypt script
Webmin - web-based interface for system administration for Unix
Virtualmin - Open Source Web Hosting and Cloud Control Panels
DietPi - Easy autoinstall for your SBC
swizzin - Modular seedbox, with nextcloud and Let's Encrypt, and much more, installed the easy way.
rtinst - Automated script for installing rTorrent + RuTorrent on debian/Ubuntu
Linux network monitors commands to monitor network bandwidth on Linux server
Unifi and Unifi-Video script install
Proxmox VE - Great freeware alternative to VMWare
Mount gdrive (or others) using rclone (with crypt)
Rclone - The best sync tool for your files to/from the cloud, with encryption-support
OpenVPN install script
Rclone Browser - Browse, Mount and move your files inside windows
https://autoize.com/nextcloud-install/ - Installation-script for NextCloud
Freeware from the net:
http://www.ninite.com - Ninite.com - Install your favorite-freeware applications in one step
http://www.broobles.com/imapsize/index.php - IMAPsize - Move/copy/backup all your emails in the same programe
http://www.pdfill.com/ - PDFill - Great PDF-software, for PDFs
https://www.ubuntu.com - Ubuntu - Free operating system (Desktop/Server)
http://www.debian.org - Debian - Free operating system (Desktop/Server)
https://nextcloud.com - NextCloud - "Host your own dropbox-server". Secure and with allot of features!
Other things:
https://www.ubnt.com - Ubiquiti networks - GREAT products, for WiFi, Surveillance and network components.
https://community.ubnt.com/ - Ubiquity Community - Stories and forums for Ubiquity users (and guests)
https://vindstoed.eloverblik.dk/da-DK/Login/NemIdLogon/ - Eloverblik.dk - Keep an eye on your electrical power usage.
http://jfich.dk//windows-shortcuts/ - Windows Shortcuts - Work faster and smarter on Windows
https://www.servethehome.com/ - ServeTheHome.com - Great site about computing
https://www.instructables.com/ - Instructables.com - Yours for the making...
https://bgp.he.net/ - bgp.he.net - IP and DNS lookup.
https://uptime.is/ - uptime.is - uptime calculator
https://www.mentimeter.com/app/ - mentimeter.com - online tool for a different type of presentations
https://www.fotor.com/ - Fotor.com - Online Photo Editor and collages
https://online.visual-paradigm.com/app/diagrams/ - Online diagram drawer (For flow-charts)
https://www.reasyze.com/shapex/ - ShapeX - Collage Generator
3D Printing:
https://www.thingiverse.com/ - Thingiverse - download your 3D models for your 3D printer.
https://www.myminifactory.com/ - MyMiniFactory.com - 3D models
https://cults3d.com/en/ - Cults3D - 3D Models
https://rigid.ink/pages/ultimate-troubleshooting-guide/ - 3D Printing Troubleshooting guide by Rigid.ink
https://www.simplify3d.com/support/print-quality-troubleshooting/ - 3D Printing Troubleshooting guide by Simplyfy3D
Dedicated server providers EU:
https://www.ssdvps.dk/ - SSDVPS.dk - Danish provider with good prices. Virtual / dedicated servers, and storage.
http://hetzner.de/ - Hetzner.de - German provider. Dedicaded, managed and virtual servers, webhosting and storagespace.
http://leaseweb.com/ - Leaseweb.com - Dutch / global provider.
http://OVH.com/ - OVH
https://www.soyoustart.com/ - So-you-start
http://kimsufi.com/ - kimsufi - French provider with datacenters in EU and Canada
https://www.myloc.de/en.html - myloc.de - Dedicated servers from Germany.
https://www.webtropia.com/en.html - Webtropia.com - German dedicated servers, hosted at myloc.de
https://oneprovider.com/ - oneprovider.com - reseller of dedicated servers in EU / US / Asia
Speedtest-sites:
http://speed.fiberby.dk/ - speed.fiberby.dk - Danish ISP with 10Gbps DK server-connection
http://speedtest.tele2.net/ - speedtest.tele2.net - Nordic ISP with 10Gbps EU server-connections
https://c.speedtest.net/speedtest-servers-static.php - Direct links to speedtest-servers