Curated OpenSource Tools
Live Sound and Lighting
Sound
Open Sound Meter https://github.com/psmokotnin/osm
Linux Show Player https://github.com/francescoceruti/linux-show-player
Lighting
QLC+ https://qlcplus.org/
SACNView https://sacnview.org/
VFX
Tools
CorridorKey https://github.com/nikopueringer/CorridorKey
3D animation
Blender https://www.blender.org/
Screenwriting
KIT (Discontinued) https://github.com/dimkanovikov/kitscenarist Starc (continuation of KIT) https://github.com/story-apps/starc
Audio/Music Production
VSTs
SFLT https://estrobiologist.gumroad.com/l/sflt
All Wasted Audio https://github.com/Wasted-Audio
APComp https://github.com/apmastering/APComp
APSaturation https://github.com/apmastering/Saturation
APReverser https://github.com/apmastering/reverser
DtBlkFx https://skullzy.ca/software/
DAWs
LMMS https://lmms.io/
Ardour https://ardour.org/
Other
plugdata https://plugdata.org/
SoundThread https://github.com/j-p-higgins/SoundThread
Home Automation
Hubs
Home Assistant https://www.home-assistant.io/
OpenHAB https://www.openhab.org/
ESP
ESPHome https://esphome.io/
Tasmota https://tasmota.github.io/docs/Getting-Started/
Replacements for Popular Services
GitHub replacements
Gitea (has small open core restrictions) https://about.gitea.com/
GitLab (no longer recommended due to open core restrictions) https://about.gitlab.com/
Forgejo (100% OSS fork of Gitea used on Codeberg) https://forgejo.org/
Anti Botting
RECAPTCHA/HCaptcha/Turnstile
ALTCHA https://altcha.org/
Cloudflare "under attack" screens
Anubis https://github.com/TecharoHQ/anubis
HAProxy-Protection https://gitgud.io/fatchan/haproxy-protection/
Google Drive/OneDrive
NextCloud https://nextcloud.com/
OwnCloud https://owncloud.com/
Google Photos replacements
Immich https://immich.app/
OnePassword, NordPass replacements
VaultWarden https://github.com/dani-garcia/vaultwarden
iTicket, Ticketek, TicketMaster replacements
Hi.Events (Easier, less features) https://github.com/HiEventsDev/Hi.Events
Pretix (more advanced and has a native Android scanning app) https://github.com/pretix/pretix
Slack, Discord replacements
Rocket.Chat (Open core with minor restrictions) https://github.com/RocketChat/Rocket.Chat
Zoom replacements
Jitsi Meet https://github.com/jitsi/jitsi-meet
GPS - Any Cloud Provider
Traccar (Works with many vendors) https://www.traccar.org/
TeamSpeak
Mumble (OSS TeamSpeak alternative) https://www.mumble.info/
Any CV generator
Reactive Resume https://github.com/amruthpillai/reactive-resume
BitTorrent
Trackers
SQTracker https://github.com/tdjsnelling/sqtracker
easy-torrent-tracker https://github.com/skipperbent/easy-torrent-tracker
Clients
QBitTorrent https://www.qbittorrent.org/
Deluge https://deluge-torrent.org/
Transmission https://transmissionbt.com/
Keygens and Cracks
https://github.com/Jasi2169/NetGuard-Keygen-By-Jasi2169
https://github.com/Still34/AffinityPatcher
https://github.com/massgravel/Microsoft-Activation-Scripts
https://github.com/massgravel/TSforge
RATs
Quasar https://git.nexbyte.co.nz/ArchiveOrg/Quasar
AsyncRAT (built on top of Quasar) https://git.nexbyte.co.nz/ArchiveOrg/AsyncRAT-C-Sharp
DCRat https://git.nexbyte.co.nz/ArchiveOrg/DcRat
NAS/Network Attached Storage
TrueNAS https://www.truenas.com/
Data Recovery
https://www.gnu.org/software/ddrescue/
https://www.hddsuperclone.com/
https://www.cgsecurity.org/wiki/TestDisk_Download
https://github.com/ISpillMyDrink/OpenSuperClone
https://sourceforge.net/projects/opensuperclone-live/
Digital Forensics
Distros
https://www.sans.org/tools/sift-workstation
Memory Dumpers
https://github.com/Velocidex/WinPmem
Quality of Life
PiHole (Network wide adblocking) https://pi-hole.net/
Cryptocurrency
Bitcoin full node https://bitcoin.org/en/bitcoin-core/
Automated BTC payment gateway https://btcpayserver.org/
open source btc wallet with full control https://electrum.org/
Stratum V2 https://stratumprotocol.org/
Inventory, Assets, Logistics, Library Management
Logistics
Inventory/WMS
Assets
SnipeIT https://snipeitapp.com/
Shelf (not intended to be selfhosted?) https://www.shelf.nu/
Library and Information Science
ILS
Koha https://koha-community.org/
Evergreen https://evergreen-ils.org/
FOLIO https://github.com/folio-org
Graphs/Databases
Virtuoso https://github.com/openlink/virtuoso-opensource
WikiBase https://wikiba.se/
Computer Booking/Print Management
Libki https://libki.org/
Education
LMS
Moodle https://moodle.org/
SIS
OpenSIS https://opensis.com/
GibbonEDU https://gibbonedu.org/
Streaming Rippers
Beatport
https://github.com/unspok3n/beatportdl
Team Awareness Kit
TAK Servers
OTS (Actively developed TAK server full of bugs) https://opentakserver.io/
FTS (not as actively developed) https://github.com/FreeTAKTeam/FreeTakServer
Original TAK server https://github.com/TAK-Product-Center/Server
TAK Clients
CloudTAK (webui for tak servers) https://cloudtak.io/
ATAK Android client https://github.com/TAK-Product-Center/atak-civ
Telecommunications
Radio Comms
OSS P25 + DMR + NXDN Network https://dvmproject.io/
4G/LTE/Cellular
LTE Core Network https://github.com/open5gs/open5gs
LTE and 5G Radio Access Network https://www.srsran.com/
PyHSS EIR https://github.com/nickvsnetworking/pyhss
Usenet
Servers
INN https://github.com/InterNetNews/inn
Diablo https://backplane.com/diablo/index.shtml
IRC Servers
Mobile
Security and Anti-Forensic
Oblivion (remote wipe and timeout) - https://f-droid.org/packages/net.oblivion.wipe/
FMD (Find my Device) - https://fmd-foss.org/
MDM
Operating Systems
LineageOS https://lineageos.org
GrapheneOS https://grapheneos.org/
Recovery
Lineage Recovery https://github.com/LineageOS/android_bootable_recovery
TWRP https://twrp.me/
Flashing tools
Heimdall https://github.com/benjamin-dobell/heimdall
FastBoot https://android.googlesource.com/platform/system/core/+/master/fastboot/
SRE (Software Reverse Engineering)
Ghidra https://github.com/nationalsecurityagency/ghidra
Warning: Email hosting is very difficult to get right. ISPs also tend to block them and your server has no reputation so your emails go to other people's spam boxes. Run at your own risk
Mail Servers
Mailcow https://mailcow.email/
Postal https://docs.postalserver.io/
Webmail Clients
Roundcube https://roundcube.net/
macOS
Apps
https://github.com/phucledien/DevUtils-app
Tools
OpenCore https://dortania.github.io/OpenCore-Install-Guide
Legacy Patcher https://dortania.github.io/OpenCore-Legacy-Patcher/
Media
Multimedia
Jellyfin https://jellyfin.org/
Large music libraries
Navidrome https://www.navidrome.org/
Gaming
Minecraft
Auth Servers
Drasl https://github.com/Unmojang/Drasl
Ely.By https://github.com/elyby
Index Generator
https://github.com/betacraftuk/asset-index-maker
Launchers
Fjord Launcher https://github.com/unmojang/FjordLauncher
MultiMC https://github.com/MultiMC/Launcher
Cracked
Fjord Launcher Unlocked https://github.com/hero-persson/FjordLauncherUnlocked
Game Server Management
Pterodactyl https://pterodactyl.io/
DRM
EPUB/Ebook
Readium LCP Server https://github.com/readium/readium-lcp-server
Networking
Network Access Control
PacketFence https://www.packetfence.com/
FreeRADIUS https://www.freeradius.org/
IDS/IPS
Suricata https://suricata.io/
Infra specific
virtualization
Clustering
Nomad https://developer.hashicorp.com/nomad
Kubernetes https://kubernetes.io/
(proxmox can cluster as well)
OS useful for clusters
NixOS https://nixos.org/
SSO
KeyCloak https://www.keycloak.org/
Authentik https://goauthentik.io/
Authelia https://www.authelia.com/
ZITADEL https://zitadel.com/
Apereo CAS https://apereo.github.io/cas/current/index.html
Policy Management
OPA https://www.openpolicyagent.org/
LDAP/User Store
FreeIPA https://www.freeipa.org/
OpenLDAP https://www.openldap.org/
Reverse Proxies, Webservers
Traefik (Proxy only) https://doc.traefik.io/traefik/
Caddy (Proxy and Webserver) https://caddyserver.com/
Nginx (Proxy and Webserver) https://nginx.org/
Apache (Proxy and Webserver) https://httpd.apache.org/
PKI
EJBCA https://www.ejbca.org/
Boulder (Powers LetsEncrypt) https://github.com/letsencrypt/boulder
Secrets Management
Vault (open core with minor restrictions) https://www.hashicorp.com/en/products/vault
SOPS https://getsops.io/
ZTN/VPN/Remote
ZTN/"ZeroTier-Like"
NetBird https://netbird.io/
UI for selfhosted ZeroTier controllers https://github.com/dec0dOS/zero-ui
VPN
AmneziaWG (Bypasses firewalls) https://docs.amnezia.org/
DNS
BIND https://www.isc.org/bind/
DHCP
S3-like storage
RustFS (MinIO drop in replacement) https://rustfs.com/en/
Databases
MariaDB https://mariadb.org/
Apache Cassandra https://cassandra.apache.org/_/index.html
Apache Accumulo https://accumulo.apache.org/
monitoring and visualization
Zabbix https://www.zabbix.com/
InfluxDB https://www.influxdata.com/
Prometheus https://prometheus.io/
Grafana https://grafana.com/
Uptime Kuma https://uptimekuma.org/
alerting and notification
Ntfy https://ntfy.sh/
Gotify https://gotify.net/
SIEM and security
Wazuh https://wazuh.com/
Error reporting
Sentry https://sentry.io/welcome/
GUI Management
Docker Management https://www.portainer.io/
General Linux administration https://cockpit-project.org/
ICANN Stack
Namingo https://namingo.org/
Nomulus (Powers the Google registries) https://github.com/google/nomulus
RIPE NCC
Registries, Repositories and Package Manager Services
Docker Registries
Quay https://www.projectquay.io/#v3
Harbor https://goharbor.io/
Official Docker registry https://hub.docker.com/_/registry
NPM
NPM Proxy Registry (Archives everything you download through it) https://www.verdaccio.org/
Backups
Restic https://restic.net/
Libraries and components
UI
MUI X https://github.com/mui/mui-x
MUI Material https://github.com/mui/material-ui
Server
Go3270 https://github.com/racingmars/go3270
Open Source Hardware
Time and Time Sync
Time-Card (Hardware+Software) - Atomic clock synced to GNSS https://github.com/Time-Appliances-Project/Time-Card
Radio
LimeSDR
https://github.com/myriadrf/LimeSDR-Mini-v2
https://github.com/MyriadRF/LimeSuite
https://github.com/myriadrf/LMS7002M-docs
https://github.com/myriadrf/LimeSDR-USB_FX3
https://github.com/myriadrf/LimeSDR-USB_GW
https://github.com/myriadrf/LimeSDR-USB
Duplex MMDVM Hotspot HAT https://github.com/phl0/MMDVM_HS_Dual_Hat
Government Open Source
United States Government
CFPB
HMDA Submission https://github.com/cfpb/hmda-platform
General Services Administration
USWDS https://github.com/uswds/uswds
United Kingdom
GovUK Design System https://github.com/alphagov/govuk-design-system
GovUK Frontend https://github.com/alphagov/govuk-frontend
Other GovUK Digital Services https://github.com/alphagov
Discord bots
Various TransPlace bots https://github.com/TransGG
YAGPDB.xyz https://github.com/botlabs-gg/yagpdb
Bastion https://github.com/thebastionbot/bastion
RedBot https://github.com/cog-creators/red-discordbot
Various Commercial/Large Scale apps
Octocon
https://github.com/OctoconDev/app
https://github.com/OctoconDev/octocon
Simply Plural
https://github.com/ApparyllisOrg/SimplyPluralApi
PluralKit
https://github.com/PluralKit/PluralKit
Pronouns.Page
https://gitlab.com/PronounsPage/PronounsPage
Ely.By
See above.
Trans Resources
Pitch and Resonance Analyzer https://github.com/lmcnulty/gender-voice-visualization
InFormant https://github.com/in-formant/in-formant