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The developers behind Paranoid Android have impressed the ROM's large fan base with the launch of HALO multitasking bubble last year.
The developers took a leaf from Facebook's Chat Heads for the concept, which handles and displays messages from different social media and messaging accounts.
Image: Paranoid Android
OmniROM is a newcomer that's quickly gaining in popularity and supports around 30 devices, including popular Nexus, Oppo, Sony, Samsung, HTC, Asus, and LG models.
Announced in October last year, some of the features the developers behind OmniROM have built into their nightlies include richer audio controls, per-app permissions, and a unique incoming call notifier that slides up unobtrusively from the display.
OmniROM is also working on "integrated phone number search", which offers OpenStreetMap or Google Places based number searchers. The user would type keywords or a place's name into the Dialer search bar and would be returned a list of relevant numbers.
The developers are focussed on delivering new features to its Android 4.4-based builds, though it does have 4.3 builds available too. It's also working on expanding its list of supported devices, with the addition being the Galaxy Nexus GSM model (which missed out on getting KitKat from Google).
One of OmniROM's chief developers who goes by the name 'xplodwild' is currently figuring out the best way to implement multiple-window capabilities on smaller screen devices, for example whether they should be split, stacked or floating windows.