Florence Virtual Keyboard
Onboard on-screen keyboard
Free Virtual Keyboard
Ghostpress
Kvkbd
KeyScrambler
Microsoft On-Screen Keyboard
Comfort Keys Pro
Keyman
Trash Typer
Spider Typer
Desert Typing Racer
Typing Chef
Click Speed Test
Typing Club
TypeFacer
Florence Virtual Keyboard KeymanBased on our record, Keyman should be more popular than Florence Virtual Keyboard. It has been mentiond 9 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
With my transparent virtual keyboard that I use on android https://play.google.com/store/apps/details?id=kl.ime.oh&hl=en_US&gl=US I get a transparent keyboard that none of the steam deck keyboards currently has (short of installing florence keyboard for linux on steam deck: http://florence.sourceforge.net/english.html ). Source: about 3 years ago
Keyman is very popular among linguists, if you still prefer a keeb that will input IPA Unicode by itself, you can get a QMK compatible keyboard (like this), but you'll need to program it, as in write the code yourself. Source: about 2 years ago
SIL's Ukelele is a popular app for creating custom keyboard layouts on macOS. SIL also recommends Keyman if you're looking for a cross-platform app for creating custom keyboards. Keyman already supports thousands of languages so they might already have a keyboard for the languages you need. Source: almost 3 years ago
While I haven't used it myself, I have heard that Keyman is highly flexible and extensible, so it may allow OP to create a layout in its own format that has the desired behavior. Keyman was originally a commercial product, but SIL (which had long advocated its use) acquired it in 2015 and made it free shortly thereafter. The original developer seems to still be part of the team working on it for SIL. Source: about 3 years ago
For Tam Thư, specifically the phonetic Latin Quốc Ngữ and Ký Âm, I'm working off of an existing keyboard distribution platform called Keyman. It's free and open source with good developer's guide. For my case, Vietnamese typing is a bit complicated with many key sequences that makes modifications to a base glyph, and Keyman is a fit tool for that in my experience. It also follow the principle of "write once, run... Source: about 3 years ago
Because Tam Thư is in fact 3 writing systems combined, I made 3 separate IMEs/keyboard layouts for each of them: 2 phonetic keyboards for Latin Quốc Ngữ and Ký Âm Tự using Keyman, and 1 logographic keyboard for Hán Nôm (think of it as Vietnamese Kanji, you can read more about its history here) using Rime. This results in the user having to install both Keyman and Rime + my IME package for each of the two. Then... Source: about 3 years ago
Onboard on-screen keyboard - An onscreen keyboard useful for tablet PC users and for mobility impaired users.
Trash Typer - Trash Typer is an enjoyable typing game specially designed for children.
Free Virtual Keyboard - Free Virtual Keyboard is a free, lightweight, multilingual and finger friendly virtual keyboard.
Spider Typer - Spider Typer is an enjoyable typing game specially designed for kids to learn to type.
Ghostpress - It is an anti-keylogger that blocks all but the intended application from receiving the keystrokes.
Desert Typing Racer - Desert Typing Racer is a Single-player, Typing and Racing video game in which the objective of the player controls a car and try to reach on the finish line by eliminating all the opponent cars.