Speech and language practice, ready to print or play.
Word lists, minimal pairs, picture cards, worksheets and games for parents and SLPs. No accounts, no email capture, no paywall. Every download is free.
- Printables
- Games
- Minimal pairs
- Web + app
hello, wanderer
Apps and a board game for speech, play, wellbeing and Japan.
Errant Software is a tiny family studio. We build speech therapy tools, a pretend-play world for kids, a gentle body-signals app, a Japan trip planner, and a board game about Japan's hidden Christians. Each one is its own little world. Scroll to visit them.
Start the journeyThat's us. Two people, one kitchen table and a lot of half-finished sketches. Half our apps grew out of the speech therapy room. The other half grew out of things we love: Japan, board games, and brains that work a little differently.
World one · the quilt
Three tools for speech and language, stitched together by Patchy the chameleon. Built by a speech-language pathologist, for kids, families and the clinicians who work with them.
Speech and language practice, ready to print or play.
Word lists, minimal pairs, picture cards, worksheets and games for parents and SLPs. No accounts, no email capture, no paywall. Every download is free.
Communication that fits the person, not the box.
Not every AAC user connects with the same screen. Patchwork gives families four ways in, and everything stays editable:
Language analysis and progress tracking, for clinicians.
Thread will pull together language samples, analysis and goals so you can see each client's progress as one continuous line, and spend less of your evening on paperwork.
Coming soon
World two · the town
A child-led pretend-play world that grows language, designed especially with autistic kids in mind. Make your own Wimble, then explore the house, the park, the library and the town, with a narrator who models words for everything you do.
Ten ears, ten eyes, ten smiles, ten colors. This is the first thing kids do in the app.





World three · the tide
For neurodivergent brains. A private, low-pressure space to notice body signals, try regulation supports, and learn what helps.


Hunger, thirst, tired, too loud. Check in with how your body feels, in words that fit you.

Sensory supports and strategies, OT-informed, to try when things feel off.

A flexible fuel rhythm and a gentle meal log. No calorie counting, no guilt.
Everything stays in your browser. Not diagnostic, just kind.
World four · the road to Japan

Plan Japan, one city at a time.
Six unhurried steps: set your dates, choose cities, order the route, pick your gateways, fill in the days, and sort out what needs booking before you go.
World five · after dark
Kakure means hidden. In this board game, set in Edo-period Kyushu, you build villages, trade rice, silk, timber, clay and iron, and keep a faith alive as Japan's Christian communities are driven underground. Build your church in the open, or hide it from the magistrate.





We're just getting started, and there are more worlds on the workbench. Pick a door: