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Developer tool startup ideas
Editors, SDKs, and the agents people code with. These developer tool startup ideas are launch films, not feature lists.
These launches are also written up as startup ideas for 2026.
21 films
T3 CodePlaysAgents can build a live visual inside the thread, instead of only answering in text. Shipped in T3 Code.T3 · @theo · Oct 6, 2026Developer tools · 0:24
Cua DriverPlaysHand-timed mouse motions for an agent cursor, picked from a playground of 82. The set is open source.Cua · @trycua · Oct 5, 2026Developer tools · 0:30
GenexPlaysAn open-source desktop app for making games with local models or a Claude Code or ChatGPT subscription.Genex · @genex_games · Oct 5, 2026Developer tools · 1:02
Cursor SDKPlaysrun.steer() adds a message to the agent’s next turn. A subagent already working stays in the background.Cursor · @cursor_ai · Oct 5, 2026Developer tools · 0:20
Together LinkPlaysA CLI that runs open models inside coding harnesses, picks a model for the task, and tracks spend.Together · @nutlope · Oct 5, 2026Developer tools · 0:57
Orca Agent SearchPlaysSearch a full agent session, including tool calls, then jump straight back into that conversation.Orca · @orca_build · Oct 5, 2026Developer tools · 2:02
Time MachinePlaysRecords a Claude Code session as a timeline of prompts, tool calls, and edits, then forks that moment into a new git worktree.Claude Code Templates · @dani_avila7 · Oct 5, 2026Developer tools · 0:16
MyGoPlaysA Go framework for desktop apps, either in a webview or with a native UI. The post points at mygo.egoist.dev.MyGo · @localhost_5173 · Oct 3, 2026Developer tools · 0:24
audiocnPlaysOpen-source audio components for apps, posted as part of the shadcn ecosystem.audiocn · @orcdev · Oct 2, 2026Developer tools · 0:18
Conductor MobilePlaysRun a team of cloud agents from an iPhone. Posted as live on the App Store.Conductor · @charlieholtz · Oct 1, 2026Developer tools · 0:12
boatPlaysFull virtual machines for agents, with a desktop and a browser. The post says the film itself was rendered on boat VMs.boat · @AniC_dev · Oct 5, 2026Developer tools · 2:12
look alivePlaysClaude Code and Codex sessions shown in the Mac notch, so you can see who is working, who is stuck, and reply from there.look alive · @finnmarten · Oct 5, 2026Developer tools · 0:10
HaloPlaysA framework for post-training open-source models. White Circle says models stay in their native Hugging Face format.White Circle · @whitecircle · Sep 21, 2026Developer tools · 0:42
Social SDKPlaysAn open-source SDK for posting, comments, and analytics across seven social platforms, plus agent skills.Social SDK · @leodev · Sep 23, 2026Developer tools · 0:56
Angular NativePlaysNative iOS and Android apps with Angular components, signals, and the Expo SDK. CSS and Tailwind are included.Angular Native · @ashh640 · Sep 29, 2026Developer tools · 0:39
komoPlaysComments on a live site that stay attached to the component and the page, so a teammate can reply in place.komo · @tjcages · Sep 25, 2026Developer tools · 0:20
terminal-browserPlaysA plugin that opens terminal-browser inside Claude Code, shown in a short screen recording.Zenbu · @RobKnight__ · Sep 17, 2026Developer tools · 0:16
AgentCraftPlaysA team of Claude agents that plans and builds inside Minecraft, and walks over when it needs you.AgentCraft · @BlendiByl · Oct 3, 2026Developer tools · 0:56
PiPlaysA coding agent running in the browser on a 2B model with WebGPU. Posted as available on Hugging Face.Hugging Face · @victormustar · Sep 15, 2026Developer tools · 0:23
Cursor ProjectsPlaysOne persistent thread with a coordinator agent, instead of a new chat for every task. The agent can hand work to subagents.Cursor · @cursor_ai · Sep 10, 2026Developer tools · 1:34
editorcnPlaysA free rich-text editor on Tiptap, set up with one command and styled to match shadcn/ui.shadcnlabs · @alaymanguy · Aug 26, 2026Developer tools · 1:05