GS-Calc is a full featured spreadsheet that can be used for editing huge files and to build complex data models with millions of formulas and GBs of data.
Worksheets and pivot tables can use 12 million rows. No limitations for using cell references to external closed workbooks.
No limitations for the number of hyperlinks. Users can add their own DLL libraries with new functions or functions replacing the default ones, with the same performance, dynamic array ("spilling") functionality and multi-core calculations. Extensive use of regular expressions in the built-in functions (Filter(), Find(), lookups) and Find&Replace functions. Automatic use of binary searching in lookup functions with any number of ranges sorted in the background.

Opening an over 4GB workbook with over 500 million cells with random floating-point numbers and text strings (8 worksheets, ~12 million rows each) should take around 30s on a low-end office pc with 16GB RAM.
Filtering (regex/operators/formulas/duplicates) a few million rows should take a few seconds (and the result can include millions of rows as well).
GS-Calc can be installed on any portable storage device and used without performing any registry modifications.

https://citadel5.com/gs-calc.htm

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12 million fast binary VLOOKUP's in GS-Calc
https://www.youtube.com/watch?v=EoRQghsNZUI

Saving/loading workbooks with 12 million rows and 100 million cells
https://www.youtube.com/watch?v=-_pn8rbfrNg

Creating a script in GS-Calc to mass-import tables from CSV/text/xBase/xlsx/MySQL files
https://www.youtube.com/watch?v=kmE1-IMInbY

Hi,

For what it's worth, my two cents to this discussion:

1. The website and every other docs clearly state that you can log on to the download page to download the latest versions for 12 months for free. And it's clear that the page always displays the latest versions only.
(I do what I can to educate users that the license doesn't "expire".)

2. Almost all old versions are still on the website. For the full versions, it's sufficient to e-mail the support, which (un)surprisingly some users do.
Trial versions dating back I guess 10 years are free downloads all the time.

3. It's ca 2MB. Not 2TB...

4. Hope that the respective modifications to the download page will be implemented rather sooner than later. It was requested by other users and it's surely is going to be helpful.

5. IMHO captcha is easy(?). An easier registration method means verifying (addresses, IPs) 10-20 spambot submissions a day. (Unless this can be done automatically for the phpBB forum.)

Thanks,
Citadel5