here is some free and open source softwares

development:

• notepad++ & notepadqq - simple but powerful text and code editor
• geany - simple ide
• vscodium - floss binaries of vs code
• kate - ide like text editor
• gedit - powerful text editor
• micro - a easy to use terminal text editor

graphics:

• krita - designed for artist but can be used for basic photo editing
• photogimp - a modification of gimp that transforms its interface into one similar to photoshop's
• pinta - paint.net alternative.
• blender - hard to learn but really powerful 3d creation software

productivity:

• okular - document viewer and editor
• superproductivity - todo list with some extra features
• libreoffice - alternative to office 365
• onlyoffice - best compatible alternative to office 365
• thunderbird - mail client that includes calender, rss feed, adress book, newsgroups and chat features

utilities:

• filezilla - ftp client
• gnome disk utility - my favorite disk partition tool for linux
• bottles - really good app that allows you to run windows apps on linux with wine really easily
• peazip - best winrar alternative
• ventoy - create usb flash drives that can boot into different isos
• kde connect - integrate your phone to your computer
• converter - local image converter
• easy effects - audio effects for pipewire applications
• handbrake - local video converter
• virtualbox - virtualization tool that good at everything except gaming
• transmission - lightweight torrent client
• openssh - connect to another computers command line
• tigervnc - connect to another computer

multimedia:

• vlc - simple and useful media player
• obs studio - not very simple but very powerful video recording and live streaming app
• vokoscreenng - very simple and useful and powerful video recorder software
• shotcut - easy and useful video editor
• tenacity - simple but powerful audio editor
• kdenlive - simple and powerful video editor
• rhythmbox - audio player
• cheese - take photos and videos with you webcam

security:

• clamav & clamtk - antivirus
• bitwarden - online and free synchronized password manager
• keybase - encrypted open source cloud file storage utility that has 250gb free storage

gaming:

• prism launcher - a really good Minecraft client that forked from multimc
• vinegar - roblox wine wrapper with some extra features for gaming
• lutris - a really good game manager

browsers:

• floorp - a firefox fork that have improvements and some customization options
• epiphany - basic browser with a beatiful gui
• firefox - web browser
• waterfox - based on firefox
• librewolf - a firefox fork that focuses on privacy
• brave - chromium based privacy oriented browser(have some anti privacy features)
• tor browser - dark web browser

internet:

• freetube - youtube client(it is really good)

communication:

• vencord - discord client
• revolt - discord alternative that has nitro features for free
• pidgin - msn looking chatting client that supports different protocols including but not limited to irc and xmpp
• element - matrix client. very secure

android apps:

• vendroid - discord client
• jerboa - lemmy client
• element
• firefox
• keybase
• proton mail
• bitwarden
• f-droid - application store
• seal - android yt-dlp gui frontend
• unexpected keyboard

favourite distros:

• arch linux - gives you a base to build upon, and you can say "i use arch btw"
• debian gnu/linux - rock solid stability
• fedora linux - basically rhel but free and more up to date
• artix linux - the unholy offspring of gentoo and arch; basically arch with a different init system