Browse All Side Projects from Reddit

All Projects (2,262)

I'm building a fitness tracker (yes one of the most crowded app categories), so I built something I

Kinoku's 1,321 exercises as stars in 3D, placed by the muscles they work. Search a move to see its muscle map and the six moves closest to it.

223

I made an open mic for the internet: book a slot, go live, then hand the stage to the next person

Years ago I watched how much attention Omegle-style sites got. There were loads of musicians, comedians and generally talented people using them just to show someone what they could do. But the random matching made it weird, and often worse than weird. The obvious alternative is going live on Twitch or YouTube, but unless you already have an audience you're one of thousands of streams nobody sees. So I built Pixady: a small number of live stages that run on a schedule. How it works - Y

213

JellyBox - a native crossplatform music player for Jellyfin, Emby, Navidrome. A real side project.

A fast, native music client for your Jellyfin or Emby server. macOS, Windows, Linux, iOS and Android, with Apple CarPlay and Android Auto.

DOMiltion - demolish sites which you don't like

Turn the page you're on into a pixel-art platformer. Try it on this page.

Got sick of Trump’s “two or three weeks” timeline predictions, so I built a free site that tra

Bigly predictions. Tremendous timelines. Yuge misses. Trump's prognostications, tracked.

Someone joked that 0 founders need an official club so I actually made it lol

A club for founders with live products and zero revenue. First sale gets you expelled.

I built an app to track science and tech projects

Track science and tech projects. Timelines, milestones, and status.

After years of struggling with animating maps I've finally went out and made my own app

Create cinematic animated travel routes, area highlights, and camera moves for videos with RouteStudio.

I built Pullfolio, a free binder app for trading card collectors. Every set gets a pocket for every

Binders for your trading cards that fill themselves in, goals for the cards you're chasing, and daily market prices for Pokémon, One Piece and Lorcana.

I made a procedurally generated cinematic anime fight music visualizer because I am bored and unempl

Drop in a song and watch two fighters made of light battle to it. Cineviz v1.0 by Subhradeep Sarkar.

My ADHD inspired Quizmark, a free chrome extension that embeds short quizzes in YouTube videos

Short quizzes at natural breaks in long YouTube videos, with a way back to the moment behind every answer. Free for Chrome.

Another SaaS bill or build it myself? I may have overreacted.

Self-hostable AGPL workspace. Chat, tasks, knowledge, approvals, and receipts in one record.

AI agents forget everything so I built a memory SDK to fix that - Maximem Synap

Maximem Synap: agentic context management for AI agents. 92% LongMemEval, 93.2% LoCoMo, under 15ms at P75 in-conversation retrieval, native across 23 frameworks. Free tier.

I made a live feed to scroll web projects using Reddit upvotes as a quality filter

Discover indie websites, web apps, and browser games ranked by community votes. Browse recent projects or explore them one at a time in Live view.

I built a site where you explore paintings by clicking whatever detail catches your eye

Discover 308 European paintings through visual echoes. Choose a detail, follow its resemblances, and learn the story after looking. Free to explore.

My side project went from 500 to 15,000 users a day and I had no idea where they were coming from

SpacePlanner is a free online space planner for drawing floor plans and layouts in your browser. No signup, no download — start planning in seconds.

I built an app that converts any text into high-quality audio. It works with PDFs, blog posts, Subst

I’m excited to share a project I’ve been working on over the past few months! It’s a mobile app that turns any text into high-quality audio. Whether it’s a webpage, a Substack or Medium article, a PDF, or just copied text—it converts it into clear, natural-sounding speech. You can listen to it like a podcast or audiobook, even with the app running in the background. The app is privacy-friendly and doesn’t request any permissions by default. It only asks for access if you choose to sh

I built a geopolitical conflict simulator, would you actually use something like this?

Data-driven alternate-history conflict simulator.

Why do Airplanes Fly?

The real reason wings lift, the explanations that are wrong, and why experts still argue about how to say it. With live wind-tunnel simulations.

I lost my job and built a daily geography game site instead of just sending CVs

Free daily geography games: guess countries from their flags, fill in grids, name rankings and compare countries. A new challenge every day.

I built D-REC, a recorder with on-device transcription and a rewind wheel. Here's the desktop demo.

Live transcription, 100% local. On iPhone, Android, Mac, Windows and the web.

billboardo is the place to showcase your work.