Projects
Reference sites and web tools we publish
Besides our add-ons and extensions, BiLingoPlus LLC publishes 16 free websites: reference sites built from public data, and tools that run in your browser. Each one names BiLingoPlus LLC as its publisher and has its own contact page.
Reference sites
Reference sites built from public data
Each one answers a single question from official or open data files, and names its sources on the site.
MileageCurve
mileagecurve.com
Shows when things break on US cars and at what mileage, system by system, for each vehicle generation. For used-car buyers and owners.
GS Pay Tables
gspaytables.com
The 2026 federal General Schedule pay tables for every locality area, compared by what each salary buys at local prices. For federal employees and applicants.
BatteryCross
batterycross.com
Type the code stamped on a battery cell and see what replaces it: what physically fits and what the voltage difference means for the device.
DistrictByZip
districtbyzip.com
Look up a ZIP Code and see every school district that serves it, with the share of homes each one holds — not just one name. For families choosing where to live.
SchoolDates
schooldates.org
School-year calendars of US school districts — breaks, holidays and staff days — read from each district’s own calendar and dated. For parents planning the year.
StateFauna
statefauna.com
Which snakes and spiders live in each U.S. state, which of them are venomous, and in which months they are seen.
DialWhere
dialwhere.com
Area code lookup for the US, Canada and the Caribbean: where a code is, its local time and overlays, and how often people report unwanted calls from it.
DxCodebook
dxcodebook.com
ICD-10-CM FY2027 diagnosis code lookup for medical coders and billers: official titles and notes, billable status and CMS flags. Not medical advice.
Browser tools
Free tools that run in your browser
Calculators, generators and games that work on your own device — no account and no sign-up.
NatalCalc
natalcalc.com
Free astrology calculators — birth chart, Sun, Moon and rising signs — computed in your browser from your birth date, time and place.
WaveTinker
wavetinker.com
Free audio tools: slowed + reverb, bass boost, trim, convert, find BPM and key. Files are processed on your device and never uploaded.
TwirlPick
twirlpick.com
Spin the wheel and other fair randomizers — name pickers, teams, Secret Santa, dice — with each entry’s odds shown; giveaway draws can be checked against a public randomness beacon.
PencilPage
pencilpage.com
Printable worksheet generators for teachers and parents: handwriting and name tracing, math with answer keys, word searches, mazes and bingo.
TierFolk
tierfolk.com
A tier list maker that works on phones: type, paste or add pictures, sort them from S to F and export a PNG — plus alignment charts and brackets.
StitchJam
stitchjam.com
Turn a photo into a cross stitch pattern with DMC floss colors, symbols and a key, as a free printable PDF; also bead, crochet and knitting charts.
StrokeFox
strokefox.com
Stroke order for Japanese kanji and kana, Chinese characters and Korean hangul: animations, finger tracing that checks each stroke, printable practice sheets.
Gridaday
gridaday.com
A new set of logic puzzles every day in six genres, from Star Battle and nonograms to Killer Sudoku, with rules, techniques and printable PDFs.