I agree, I've personally used MatDeck and find it to be full of surprise. It's GUI Designer is really useful but its not that aesthetically pleasing especially compared to VisualTK but it does work much faster and has more to offer. Pygubu is a great GUI Designer but its just a GUI Designer and it doesn't offer any other features like the one I use(https://...
PYGUBU and Python GUI Builder are good but they are old and outdated. Try out MD Python(https://labdeck.com/python/), its got a GUI Designer that uses drag and drop. It's similar to VisualTK but it has got a lot more elements and works a lot better and more consistently. I find that VisualTk sometimes doesn't actually show my code.
MD Python is a fully-...
For merging I have until recently used PDF Split and Merge
But PDF-Arranger is even more smooth, because you can split/merge/rotate and visually arrange in one go.
It still does not solve the compress issue.
GuerrillaMail.com is very similar to the sites you mention, and the core of it appears to be this open source project:
It's not a turnkey solution, but it could be a good start toward building your own version.
Last year i found this awesome tool called Mathcha. They describe it as
Online Mathematics Editor.
a fast way to write and share mathematics
You can do quite a lot with it. In their \math container, you can write math equations in real time using LaTeX keywords. And in their \diagram container, you can draw shapes and even plot graphs. Just take a look at ...
You can use Notepad3 for that purpose. It's a very lightweigth Notepad clone that, while focused on being developer-oriented, it also has a simple and minimalist interface. Most developer features can also be disabled so you can end up with a simple plain text editor and not much more.
About your feature requests:
Preferably one that is open source
I can highly recommend JSONedit. It serves as both a JSON viewer and JSON editor.
It features text, tree, and list views.
It is portable software and is free of cost (freeware). It even features a dark theme/mode.
The only issue I've had with it is that it crashes for me when I open very large (hundreds of MBs) JSON files. I'm hoping the author has time ...
Old question, but a simple way to do this is as follows:
Use a simple timetracker like Kimai v2
Create a "Customer" named after the nursery or childcare provider e.g. "All Day Nursery"
Create Parents as "Projects" by creating a Project for each one against this "Customer". You can use parent names or any ID Number. ...
It's maybe a bit dated by now, but I have been using TextPad for many years now. One of the features they advertise is being able to edit "huge" files.
It has all the useful features you'd expect from a text editor, and then some. I've been trying to find a better one without success so far.
It is not free (but free to download and evaluate), but ...
CudaText editor. It's FOSS. Regarding your wishes:
that is open source: check
can handle large files: check, just use option "ui_max_size_open" to change the limit
and does not use Java or Cygwin: check
features like project management: check
git integration: missed
syntax highlighting or regular expressions: check