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Terraria-Map-Editor
TEdit - Terraria Map Editor - TEdit is a stand alone, open source map editor for Terraria. It lets you edit maps just like (almost) paint! It also lets you change world settings (time, bosses downed etc), edit chests and change sign, make epic dungeons, castles, cities, and add rewards for your adventurers!
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
From here: https://github.com/TEdit/Terraria-Map-Editor/releases , latest version is 4.13.0. There is a file there, called TEdit_main.zip . Download it, then extract it from the archive and start it from the TEdit.exe (there is no installation involved, just run it). It is true that most tutorials are outdated, but the core features of the program are still the same. Anything new/extra can be cross-referenced with the wiki : https://terraria.wiki.gg/wiki/Terraria_Wiki and is pretty intuitive to use.