Software and apps side hustle ideas

A web app, SaaS, mobile app, browser extension, bot or API that people pay for or that earns from ads.

5 ideas

Software and apps
Open source UI library funded by sponsors
Maintains a UI library for a programming language and gets income through GitHub sponsorships.
Under $100Online
Hacker News, 2024
Software and apps
Online multiplayer domino game with donations
Built an online multiplayer version of a domino-based game, funded by donations after ads did poorly.
Online
Hacker News, 2022
Software and apps
Chess variant mobile game funded by donations
Built a single-player chess variant app without ads or in-app purchases, supported mostly by donations.
Hands-offOnline
Hacker News, 2022
Software and apps
Document editor funded by protocol grants
Built a document editor on a decentralized protocol alongside a day job. Revenue came from grant money from the protocol.
Online
Hacker News, 2021
Software and apps
Patreon support for open source game
Collects small monthly support on Patreon for a niche open source game.
Under $100Online
Hacker News, 2019