5 Free GitHub Repos That Replace Paid Apps, Tested: Filee, DigUp, ai-memory, MailCheap and Hypit

Five free projects on GitHub can do jobs people usually pay for. One converts almost any file without uploading it anywhere. One searches your computer by what's inside your files. One gives all your AI coding tools the same memory. One cuts a newsletter bill to a few dollars of email. And one clones the whole format of a viral video.

They're all open source, which means the code is public and anyone can download it and use it. We installed all five on one Apple Silicon Mac on October 25, 2026, and tested each one on made-up demo files. Each project gets a stamp: works, half works or hype, plus how long setup took and the one catch you should know about first.

The results at a glance

5. Filee: convert any file without uploading it

You need a PDF turned into a Word file, so you search for a converter and upload your signed lease to a website covered in ads. Filee does the same job on your own computer. You hold one key, drag a file, and a ring of formats pops up at your mouse. It handles more than 250 formats, from iPhone photos and Word files to e-books and 3D models, and it had 12,112 GitHub stars within a month of launch.

We cut it off from the internet completely and tried it:

• iPhone photo (HEIC) to JPG: 0.51 seconds
• Word file to PDF, without Word installed: about a second (0.83 s median)
• Three PDFs merged into one: 0.26 seconds

The catch: on a Mac it's still a preview and the app isn't notarized yet, so the first time you open it your Mac blocks it. Allow it once in System Settings → Privacy & Security → Open Anyway. Windows and Linux builds are also available.

4. DigUp: search your computer like Google

You know the photo is on your laptop. You just don't remember what the file is called, so search finds nothing. DigUp runs Google's small EmbeddingGemma 2 model, released in October 2026, on your own computer. It understands text, photos, audio and video, so you can describe what you want in normal words.

We made a test folder of seven files and ran three searches:

• "The part of the lease about pets" found page 4 of a five-page lease, even though the word "pet" isn't on it. That section is called "Animals".
• "A dog on a beach" put a photo named IMG_2231.jpg as the top result.
• "Where they talk about sleep" jumped to 2:55 in a five-minute podcast, right where the topic starts.

Nothing you index leaves your computer: no account and no tracking. The catch: the first download is 865 MB, and indexing takes time. Our seven files took 20 seconds, but the project says a big Downloads folder can take an hour. On a Mac you need an Apple Silicon chip; Windows and Linux are in beta.

3. ai-memory: one memory for Claude Code, Codex and Cursor

You're halfway through a job in Claude Code, you hit your usage limit, and you switch to Codex. Codex knows nothing, so you explain the whole project again, including the fixes that already failed. ai-memory is one shared memory for more than 20 AI coding tools, including Claude Code, Codex, Cursor and Gemini. It had 13,446 stars and gained 3,541 of them in a single week.

Our test: we gave Claude Code a small app that splits a dinner bill, with one bug, let it try one fix that failed, and quit halfway. Then we opened Codex in the same folder and asked "where were we?" Codex answered that the previous session had rounded each share with Math.round, that the test "shares add up to the full bill + tip, to the cent" failed, and that rounding left one cent unallocated: $117.99 instead of $118.00. We didn't explain a thing.

The everyday setup makes zero AI calls, so it doesn't add to your bill, and the memory is plain text files you can open and read. The catch: the memory lives on a small server you run yourself. Setup took us about a minute and a half.

2. MailCheap: a Mailchimp alternative that charges per email

This one started an argument online. On October 14, beehiiv founder Tyler Denk posted that every week someone tells him they'll build their own beehiiv over a weekend. The next day developer Marc Lou replied that he had "vibe-coded beehiiv, and it's 83% cheaper", and gave the code away.

Most newsletter apps charge by the size of your list, including subscribers who stopped opening your emails a year ago. MailCheap charges for the emails you actually send. Self-hosted on Amazon SES, 10,000 readers getting four issues a month is 40,000 emails, which costs about $4 to $6. For comparison, Mailchimp's Essentials plan at 5,001 to 10,000 contacts starts at $110 a month at the regular price, and beehiiv's Lite plan at 10,000 is $119 a month billed yearly (both checked October 25, 2026). It imports beehiiv, Substack and Mailchimp exports as they are.

We installed it locally and reached the dashboard in three minutes. We created a newsletter, imported a Mailchimp list with fake contacts (22 added, 3 left out), wrote an issue, and its review checklist checked everything. Then we hit send, and it stopped.

The catch: everything works right up to the send button. To actually send you need an Amazon SES account approved for production sending, and the project says to plan about an hour, mostly waiting for that approval. Self-hosting comes with no support. The hosted MailCheap Cloud starts at $19 a month for 20,000 emails.

1. Hypit: clone any viral video's format

Hypit had 25,562 stars when we tested it. You give your AI coding agent (Claude Code or Codex) a viral video, and it rebuilds the whole thing as a recipe: the shots, the captions, the B-roll and the effects, all timed to the words. Then you swap in your own topic and make it again.

We installed it into one project with a single command:

npx skills add hypit-ai/hypit -a claude-code -y --copy

Then we gave Claude Code one of Hypit's own tier-list examples and asked for the same format ranking AI chat apps instead, with no paid AI models. Ten minutes later, without asking a single question, it produced a finished video. The hook, the title band, the S-to-D ranking board, the caption style and the twist at the end all carried over.

The catch: the tool itself is free, with no fees and no watermark, and our version with code-drawn graphics cost nothing. But AI-generated people or footage come from paid models. The moment we asked for an AI person, it asked us to log in to its own paid service, HypiHub. Its page puts the AI version of this exact video at about $1.15, on plans that start at $9.90 a month.

Is cloning a video's format fair?

Copying a format, meaning the pacing, the hook and the caption style, is how most creators learn. Copying a person's face and voice is something else. Hypit can do both, so the line is yours to draw.

How we tested: one Apple Silicon Mac, October 25, 2026, made-up demo files in a test folder and never real personal files. One test per project, not a study. Star counts and prices are as of that date.