Last Epoch Planner vs Voidforge

Last Epoch Planner is a free, open-source build planner for the game Last Epoch, available in a browser and as a desktop application. Players can map the passive tree, choose up to five skills, and allocate points in their skill trees. Items can be imported, crafted, or modified, with support for Rare, Exalted, Unique, Legendary, Set, and Idol items. The planner tracks stats and calculates DPS for several skills, chances to inflict ailments, and debuff effects. Builds can be shared through lastepochplanner.com URLs, and the changelog documents online imports through the Last Epoch Tools API. The desktop app can import offline characters and builds from Last Epoch Tools; offline character import is not available in the browser version. The project is MIT-licensed. Its README cautions that many stats and affixes do not work correctly, and that recognizing a modifier does not guarantee the calculation will behave as expected. The desktop version runs on Linux through Wine; native Linux support may come later.

Voidforge is a free web-based Warframe build planner and theorycrafting toolkit. It calculates stats in real time and provides damage simulations with faction-specific time-to-kill estimates. Builders cover weapons, Warframes, companions, Archwing, Necramechs, Railjack, and modular weapons. The Weapon Builder handles mods, arcanes, rivens, and Incarnons, then reports burst and sustained DPS, status breakdowns, and elemental combinations. Its Damage Simulator includes Viral and Corrosive effects, damage over time, and armor reduction. A Codex lists mods, arcanes, Archon Shards, weapons, and Warframes with effects and data coverage. Users can save builds locally or to an account, import or export loadouts, publish builds, browse and upvote community loadouts, and share profiles. There is no paywall or premium tier; donations are optional. The project is MIT-licensed open source, but its repository is not intended for self-hosting.