*[https://solvespace.com/index.pl SolveSpace] - is a free (GPLv3) parametric 3d CAD tool. Modeling 3d parts, modeling 2d parts, 3d-printed parts, preparing CAM data, mechanism design, plane and solid geometry.
====Web Browsing====
*[https://www.mozilla.org/firefox/ Mozilla Firefox] - is a free, open source web browser developed by the Mozilla Foundation and Mozilla Corporation in 2004. The Firefox web browser can be used with Windows, Mac and Linux operating systems, as well as Android and iOS mobile devices.
::Extensions & Configurations
:::*[https://github.com/hackademix/noscript NoScript] - The popular NoScript Security Suite browser extension.
:::*[https://github.com/ChrisAntaki/disable-webrtc-firefox WebRTC block] - WebRTC leaks your actual IP addresses from behind your VPN, by default. With this extension you can disable it.
:::*[https://github.com/arkenfox/user.js/ user.js] - Firefox privacy, security and anti-tracking: a comprehensive user.js template for configuration and hardening.
:::*[https://github.com/yokoffing/Betterfox Betterfox] - Firefox speed, privacy, and security: a user.js template for configuration. Your favorite browser, but better.
====Chat Applications / Platforms====
*[https://www.jabber.org/ Jabber] - is a original messaging service based on [https://xmpp.org/ XMPP] and has been continuously offered for free since 1999.
::XMPP clients
:::*[https://xmpp.org/software/ XMPP client list] - is a list of XMPP clients composed by XMPP itself.
:::*[https://otr.cypherpunks.ca/ Off-the-Record Messaging (OTR) for XMPP] - is a cryptographic protocol that provides encryption for instant messaging conversations. OTR uses a combination of AES symmetric-key algorithm with 128 bits key length, the Diffie–Hellman key exchange with 1536 bits group size, and the SHA-1 hash function.
*[https://github.com/briar Briar] - is a messaging app designed for activists, journalists, and anyone else who needs a safe, easy and robust way to communicate. Unlike traditional messaging apps, Briar doesn't rely on a central server - messages are synchronized directly between the users' devices.
*[https://matrix.org/ Matrix] - is an open network for secure, decentralised communication.
*[https://discord.com/ Discord] - is a voice, video and text communication service used by over a hundred million people to hang out and talk with their friends and communities.
::Discord client advice
:::*1. Stop using the installed electron PC based version. Use the web version.
:::*2. Android stock client is spoiled with rubbish code slowing down your SoC and sending loads of analytics, use [https://github.com/Aliucord/Aliucord Aliucord] instead (but carefully read the readme.md, ToS issue).
====Image Manipulation Tools====