RePen
A free Windows screen annotation tool for classes, presentations, tutorials, and live explainers.
- Draw and highlight over any Windows application.
- Use focus tools, boards, saved sessions, and PDF export.
Teacher by day · Developer by night
I build practical software for real classrooms — and curious minds everywhere.
I’m Rehman Ahmad — a head teacher at a government primary school in Yazman, Punjab, and a full-stack developer. Everything on this site is free, practical, and built to last.
- 8+
- Years teaching in Punjab’s schools
- 370+
- Free apps catalogued on FileCobra
- 20+
- Punjab textbooks online with reader
- 20+
- Free in-browser tools shipped
About me
A teacher who ships software
Since 2018, I’ve led a government primary school in rural Punjab — managing classes, exams, and records with whatever tools were at hand. When the tools didn’t exist, I built them: first for my own school, then for schools across the province, then for anyone on the internet looking for software they can trust.
That’s what this site is: my workshop. Verified downloads, school administration tools, free textbooks, and practical guides — each one solving a problem I’ve personally run into.
TypeScriptAstroPythonJava (Android)Cloudflare WorkersSEOTechnical WritingUrdu EdTech
How I work
Four things you can count on
Built for real classrooms
Every tool is tested against real school constraints: slow phones, patchy internet, shared logins, low ink.
Ships completely
From first commit to deployed, documented, and maintained. Nothing half-done, nothing abandoned.
Explains simply
A teacher’s habit: guides, docs, and tutorials written in plain words anyone can follow.
Owns the whole stack
Frontend, backend, Android apps, SEO, deployment — one person, end to end.
Selected work
Projects people actually use
Not demos, not mockups — live products with real users.
Free software hub
FileCobra
370+ verified Windows & Android apps. Every download is hash-checked and signature-verified before it ships.
Visit siteFor Punjab’s schools
SBA Portal
Result cards, registers, and letter pads for government schools — running on real school phones today.
Open projectFree course books
Punjab Textbooks Library
PCTB textbooks with a continuous-scroll reader, chapter quizzes, and teacher tips — free for every child.
Open projectIn-browser tools
PDF Conversion Hub
16 free PDF tools that run entirely in your browser — merge, split, convert, sign. No uploads, ever.
Open projectExplore
Choose the right place to start
Software, tools, textbooks, worksheets, and guides — pick whatever you need today.
Software
Download practical desktop applications built for focused work on Windows.
Explore softwareFree Online Tools
Use focused browser-based utilities without a download or account.
Open toolsTextbooks
Read Punjab course books online with chapter quizzes and teacher tips.
Open libraryWorksheets
Find printable learning resources for children, students, and teachers.
Browse worksheetsTutorials
Follow step-by-step guides for software, productivity, and learning workflows.
Read tutorialsClient work
Need a web app, an Android app, or help with SEO? I take on select projects.
Software Suite
Free Software by Rehman Ahmad
Discover RePen, a free screen annotation tool for Windows that helps teachers and presenters draw, highlight, and explain over any application.
Featured online tools
Useful in one browser tab
Small, practical browser tools that solve one focused task. They are separate from downloadable software and keep your work on this device when the tool supports local processing.
Visual Robots.txt Generator & AI Bot ControllerGenerate, audit, and test RFC 9309 robots.txt files in your browser. Block AI scrapers with 1 click, allow search engines, and test URLs in a live sandbox.Unicode to InPage ConverterConvert Unicode Urdu into legacy InPage-compatible text, or recover readable Unicode from copied InPage text.Urdu Keyboard & Phonetic TypingType Unicode Urdu with Roman Urdu suggestions, a complete on-screen keyboard, and supported-browser voice typing.Syllable CounterCount syllables in English words, sentences, poems, lyrics, and haiku with a word-by-word breakdown.Classroom Seating Chart GeneratorBuild a random classroom seating chart that respects your restrictions: keep students apart, seat partners together, and reserve front-row desks.Urdu Handwriting Worksheet GeneratorGenerate authentic 4-line Urdu calligraphy practice sheets with authentic Nastaleeq dotted tracing and A4 print export.Punjab SBA Result Card GeneratorImport a text-based SIS class roster locally, create an editable single-subject award list, or enter marks and print an A4 Punjab SBA result card.Image Resizer to 25 KBCompress JPG, PNG, and WebP images to a 25 KB maximum or a custom file-size limit, entirely in your browser.Background RemoverRemove the background from any photo online free. Upload a JPG, PNG, or WebP and download a transparent PNG — no account, no watermark.AI Image EnhancerEnhance photos free in your browser: one-click auto enhance, AI 2×/4× upscaling, brightness/contrast/saturation controls, filters, resize, and JPG/PNG/WebP download. No uploads, no limits.Watermark RemoverRemove a watermark from an image free, in your browser. A text-aware document mode cleans stamps and pale watermarks off scanned pages without erasing the writing underneath; a photo mode brushes away logos and date stamps.Passport & Visa Photo MakerCreate 100% compliant US 2×2″, Schengen 35×45mm, UK, Canada & international passport photos. Tile 6 photos on a printable 4×6″ sheet for 35¢ pharmacy prints.ID Card Print Sheet MakerScan your CNIC front and back, then print 8 exact-size ID card copies (85.6 × 54 mm) on one A4 page as a free PDF. Smaller sizes fit up to 32 per page.PDF & Document Conversion HubConvert, edit, compress, split, merge, watermark, and sign PDF files entirely in your browser with 100% privacy.
Free download
ReJob — a free Blogger theme for job sites
The exact theme running my Job Enabler blog — now free for your own Blogger job board. Built for jobs from the ground up, not adapted from a magazine theme.
- JobPosting + FAQ schema built in — Google can show your posts as rich job listings, with the deadline taken from the post itself.
- Deadline countdown chip — one
[lastdate]shortcode shows “days left”, “last date today”, or an expired banner automatically. - Breaking-posts ticker + homepage filters — the ticker rotates your latest jobs under the header; visitors filter by category, province/city, and education;
[apply]and[official]render the official button pair. - A backend that explains itself — every setting is described in plain words, a START HERE checklist walks you through setup, and a built-in AI prompt turns a newspaper job ad into a ready-to-publish post.
Get the theme
Version 1.7.0 · Blogger XML · Free for use on your own blog — the only condition is that the footer credit link stays in place.
Download theme (XML)Programming Tutorials and Learning Resources
View all posts »Read practical programming guides, computer science tutorials, educational worksheets, and software development articles by Rehman Ahmad.
Shipping Software with AI Agents: How I Built a 48-Rule Scanner in 2 Days (and What 3 Audit Teams Found)
Shipping software with AI agents as a solo dev: I built a 48-rule scanner in 2 days, then 3 audit teams found 9 real bugs. The checklist I use now.
Free Digital Classroom Tools: How I Run a Paperless Classroom on Zero Budget
Free textbooks on screen, LibreOffice worksheets, one spreadsheet and WhatsApp notices — how I run a paperless classroom on zero budget.
Free Printable Worksheets for Grade 1: A Starter Pack (Letters, Numbers, Shapes)
A free Grade 1 starter pack from a head teacher's classroom: eight gentle pages of letters, numbers, shapes and matching games for five- and six-year-olds, built for confidence first and skills second.
Is, Am, Are Worksheets (Free Printable with Answers) — English Grammar Practice
Free printable is, am, are worksheets for Grades 2 to 4: a simple rule chart, fill-in-the-blanks, choosing and sentence-fixing exercises, and a full answer key — plus the oral-first way I teach this tiny verb trio in my own classroom.
FAQs
About Rehman Ahmad: Frequently Asked Questions
Learn more about Rehman Ahmad, the software, and the educational resources provided on this platform.
Who is Rehman Ahmad?
Rehman Ahmad is a software developer and educator from Bahawalpur, Pakistan, known for creating educational resources, programming tutorials, and productivity software.
What software has Rehman Ahmad built?
He builds practical software tools, including RePen, a free Windows screen annotation and presentation overlay for teachers, demos, and tutorials.
Where can I download RePen?
You can download RePen directly from the Software section on this website or from the official GitHub repository.
Does Rehman Ahmad provide educational worksheets?
Yes, Rehman Ahmad provides free printable educational worksheets, including alphabet tracing and preschool handwriting practice, available in the Educational Resources section.
Have a project in mind?
I take on select client work — web apps, Android apps, and SEO. Tell me what you’re building, and let’s see if we’re a fit.
Get in touch